One nice thing with the new ARC Viper is all of these mods can be done without having to pull off the covering. What a great offering from Great planes. We use these in local 428 as well but they do need some strengthening here and there. I did have a wing blow off with the Nelson on it. The wing mounts probably need to be looked at as well.
As for electric starter damage, at least for 424, I start mine by hand. I am a CL flyer though and electric starers are not only hard on airframes but engines as well when not properly used.