It's SOB to fit bulb in. Must be the dumbest. If it was a "push fit" instead of "end fit" as installed would've been easier. Upside down, small bulb, no room to hold bulb with fingers and still see the small hole the bulb fits in. Forcing bulb in pushes the movable contact too far to spring back for a good fit. ugh!i bought the feestoon 31mm
Thats what mine looks like. Where did you get your LEDs? I got mine from superbrightleds dot com.mine too just showing you the pic of the led bulb I have on mine it is a 28mm, hope this help to clarify.
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