So since HK-51 seems to be the subpar tanking companion it would be great if he gets fixed one day. But since there has been so much effort put into HK-55 and his resurrection, I wouldn't mind if we are allowed to use our HK-51 customization on him too. I like the way this was handeld with Khem Val and Ak'ghal Usar, who are just reskins of the same Dashade model and now all Khem Val customizations are in fact labeled as Dashade customizations. All HK-51 customizations seem to labled simply as HK customizations already, the only thing missing is the addition of HK-55 as a companion who can use those customizations.

Seems only reasonable, hope BioWare is listen to this.

it would be safe to assume that any HK-50 series would be similar enough for customization cross-overs under normal circumstances

This is a good idea. Just the other day I was mentioning to someone that it looked like they might have intended to allow it for HK-55 because most HK customizations have "HK-51, HK-51" listed, instead of just putting HK-51 once. I thought perhaps it was a placeholder so they could one day change the second one to 55.

 

But yes, please do include HK-55 in the HK customizations.