Thanks for the comments guys.
^yes you're right. Typo but I did buy cusco camber arms also yesterday:)
I think the crush tube not being centred accommodates for the bend in the rods, so when bolted up the angles should be correct. I will check again.
Either way ill be taking more measurements and dummy fitting before I decide on hacking into anything.
Also I have access to a workshop with lathes and milling machines and guys who are willing to do the work for me, so it will be done properly and won't cost anything either.
$50 is tempting but considering the issues i read you had with the sri's I'd rather stay away from el cheapo arms. Kind of why I want to make these fit. They're good quality and in great shape and the price was also right. Good attempt to flog them though. 10 points for effort;)