RE: SebArt Sukhoi 30E
Yeah i've been pretty happy with the hs-81s they seem like a great servo..Havent had any centring problems yet, though with time i imagine they would wear.
Will have a look at the original hardware when it turns up...My mate changed all his Sebart Katana 30 to ball links...though he is a fusspot. It does look very tidy when its all put on though!