Thin Walled, Closed One End Wrist Pin Questions?

[John (Taylor) Gabrowski]

Does anyone have any experience using these thin wall closed one end wrist pins (used with Mercs 600-4 rods in Merc Mk55s and earlier) in a Modified Merc 44, 4 banger taking up the excess end of wrist pin spaces each side with formica plugs then installing wrist pin keepers?

Any negatives so far if you are using them this way?