I don’t think the lock causes any issue with the weight distribution. It just happens to be the case that BulletProof uses a softer metal (stainless steel) on their locking pin. Since it’s not as strong of a metal, the extra force from WDH spring bars may bend the pin. I’ve seen this happen with other pins as well.I have not uses bulletproof pins but all I use are locking pins and never had an issue with WD bending them
I did just get off the phone with BulletProof and they said it’s no problem using the locking pin on the hitch bar/shank. They said it’s only necessary to use the standard pin on the 2 spots that attach the WDH adapter to the hitch bar. They recommended that if you are worried about theft after unhooking the trailer then to just swap one of the regular pins on the adapter for a locking pin just while unhooked.

