Adding the weight of the epoxy will affect the float setting. You can compensate for it by using the sight tube method and adjust based on fuel level instead of float height.I measured the resting float height. These photos are only from the suspected carb that had carbon fouled plug. When I sighted down the floats they all seemed to sit at the same height, no tweaking on them.
The last photo shows a repair I did to the float which had a leak, I used a small amount of tank weld to repair the holes which worked well… but do you think that this could be causing some sort of issue?
Thanks again for your time and helpful knowledge.
I'll add that I've done the same in the past. My opinion is it's false economy... buy a new float.