Product review (4 stars): You can do it!
Did not fit my model LRSC26920TT, but I made it work with common tools. Note that the tabs are off-set, and not necessarily too large for the holes, so you will need to file the tabs down on the sides shown with the arrows. Don't file down just any side, and don't file down both sides of one tab.*** Here we go. Start with a nail file [I used a metal cosmetic nail file, but you can probably also use an emery board]. 1). Shave down about 2 mm from the "outer side" of the tabs [Note -the pic here shows only about 1 mm shaved down -- you need to shave away up to 1/3 of the tab and only shave down on the side of the tab shown under the arrows]. Do this in the same manner on the corresponding two tabs on the other side of the  funnel. 2).Then [not shown, and this is optional] shave a tiny bit off the "nose" of the hook of the tab so it is slightly rounded, being careful not to shave down too much. Two to three gentle passes of the file is enough. 3). Briefly use a flashlight to get the lay of the land, then position the four funnel tabs into the tab holes [shown in pic 2]  and see / feel whether they are falling into place. 4) Employing serious gusto, push the two tabs from one side [I did the left side first] until you hear/ feel it snap into place. For the other side, you will position the remaining tabs into place and then use a flat head screwdriver or similar object to put precise pressure under one of the last two tabs, and push it into place [I selected the  NE tab from my perspective facing the fridge since I could see that one best]. When you get that third tab in, the last tab will likely pop in along with it. ***These last two steps may be frustrating since the funnel is not going to snap in too easy and so you will be wondering if you shaved off enough of the tabs. As a rule of thumb, DO NOT file down more than 1/3 of the tab. And, do not remove too much of the tab "nose" -- that step might not even be needed but I feel that it helped somewhat to get the tabs to snap in place since I don't have a lot of hand strength. Note that I took the picture of the shaved tabs before I did the final filing, so go a bit further than what I am showing. I ultimately shaved the tab down to about where the blue dots are [no need to shave *below* the dots, keep that bit there for stability].*** Finally  [or firstly,], if you want to verify that you have the off-set tab problem before you go shaving down anything, take a piece of scotch tape and run it along the frame with the two holes [pic 2], press so that you get an outline of the holes and the corners, then remove the tape and compare the outline of the hole placement on the tape to the tabs on the funnel being sure to visualize how you will place the funnel in relation to the holes. Doing this is how I determined where to do the filing of the tabs. Hope this helps.