Hi, in this series of videos I'm going to be showing the modifications which I'm making to the hobby engine excavator. I've actually got two of these. One is the very basic model here which comes with 27 megahertz and is controlled with this transmitter here. And the other which actually started life as the 2.4 gigahertz controlled with this transmitter here, I'm actually in the process of conversing over to be controlled by my spectrum DX10T. This is the other one which I've started working on and as you'll see I've already started to change the way which it is driven. When they come they come with a series of motors actually inside the model and I wasn't particularly happy with the way that it moved or the amount of travel that you get. So far the modifications which I've done to this here, I've taken out both of the electronics, I've put in a saber tooth, tank or robot type speed controller for the tracks, I've put in a fairly basic hobby wind speed controller for the turning motion and I've put the first of my forgelli linear servos. So far I've been quite pleased with this and I've got another three on order which I'm hoping are going to come tomorrow. So just to show you the basic comparison, if I first will take the very basic 27 megahertz version I'll just take this other one down, I'll just give you some idea of how the thing moves. It's not bad, it's not really not what I was after and what I wanted was something that is in between these cheap, quite realistic in my view toy models and the several thousand pounds for the full hydraulics. So for the left and right single speed, but actually that's not too bad. For the arm articulation, that is as far as it goes and then back again it does it order one motion with the 2.4GHz version you can't independently control the bucket which is a little bit better. And then for the arm up and down, again not bad but actually quite limited in the travel and it certainly won't go lower than hitting the ground there. The real big letdown with these in my view is the control of the tracks. With the M207 megahertz you've got absolutely no control of the speed and so it's kind of full speed everywhere. I'll just give you some idea. Which is not terribly easy if I wanted to do something like drive it up on the back of a trailer which is clearly something that I would want to be doing. So just turning to the other one for a moment. Here we have the 2.4GHz version of the model and it kind of comes like this I haven't made the thing dirty and it's sort of got sand stuff all over it. However I'm quite happy with the way that looks and one of the first things that I've managed to discover is a driver that goes in to think that looks quite good and this is one of the bruiser drivers. Then they're not too expensive but they seem to be very high quality and they're and their joints move in a lot of different ways. So I've taken all of the motors out of the arm and the only one which is actually working is that one that you can see on the top. So I'll just give you some idea how this moves. And the total amount of movement is 100 millimetres. These come in a number of gear ratios and the higher the gear ratio obviously the slower it moves but more power flutes. This one here is the fastest of them and the model is an L12. 100 millimetres is the travel and the gear ratio which is the fastest of the gear ratio is 51. Not amazing how far but you get a reasonable speed. For the other arms I'm actually getting the linear servos which are twice as slow as this but they've got 50 millimetre movement. So you get about five pounds pressure out of each of them but they will move their whole length in about the same time as this one does because they're servos and the sticks you'll see that when I pull the stick back a little I have to hold it in place because if I let go it will just return to the place that it first thought of. And in order to be able to use these sticks for both controlling the tracks and for moving the arms what I've done is I've started to program in some basic mixes and one of the good things about the DX10 is that you can actually name the different function modes and at the moment I've put two on there and hopefully you can see the writing and I've probably listened to my F switch so that when my F is in the lower mode it is in digging and when I flip it up it is in what I've called tracking and in order that I can still control the arm what I've done is I put in a mix so that I can actually decide where that arm goes by using one of the pots. So I can still move the arm and it will stay wherever I put it for instance if I want to put it back up on the loader just to show you how the thing works in tracking mode I'll just give you a quick demonstration of that so if I want to turn on the spot I can do that and I can actually move it very very slowly which is pretty good or just pack it up very very slowly I'm quite pleased with the way that this is worked out able to use the stand and make the gearbox it seems to be just fine and I can slowly move it all forward or I can slowly move on backwards also with the speed controller on the on the main turn I can move it very very soon if I want to or I like to vary this or I can or I can have it move much faster you can if you want to do both things at the same time if you have a good coordination so I'm not going to throw it off the table I'll be posting some more videos when I've done some more stuff I hope that this has been interesting for people to see thank you