Product review (4 stars): Hard to put in;Tip to help
This igniter was very hard to change . I have some suggestions that worked very well for me. These igniter are very fragile and break if dropped or bumped. I did not have to remove the drum or front bulkhead but did remove the lint screen duct. Prob is that the igniter attaches to a secondary bracket then that bracket is mounted in a receiver slot. You must open up the receiver slot with a flat screwdriver pried into it until the bracket will fit into it easily without needing force. THEN mount the igniter on the bracket and slip the bracket carefully into the receiver slot. Nexed find a 5/16 head screw as in common in the trade and put it in from behind ; oposit direction from what it was in originally. I mean from under the burner mount.
That screw will keep the bracket from possibly coming up and out. the  screw is still hard to get in but a little grease on it will help and if you can bend the box end of a 5/16 combination wrench about 45 deg in a vice it should be easy. The object here is to not  break the igniter while trying to install it.