Question on rear seat reinforcing gussets

I am putting in the F-482 gussets for the passenger seat on my RV-4 as described in the service bulletin 97-5-1. However, I am worried that they will not be robust enough; I saw a RV-8 and those gussets seemed much bigger than the ones I got from Vans. Has anyone used the gussets for the 8 on a 4? Would that be advisable? Pics attached of the RV-8 with gussets installed, and the ones I got for the 4.

I don’t recall either of them sticking out like that.. I thought that they were both flush..

RV-4 Brackets for Seat Back Mod

I just installed them on an RV-4, and they had to be trimmed somewhat on that end showing to fit. The other problem is that there is also usually some wiring that comes through there and interferes, so you have to improvise.

@ToddRV, Okay, thanks