Thanks guys some great info there
Talon, you say you wouldnt use hydraulic as its annealed yet hydraulic tube gets a mention in the book.... I am just trying to get some perspective here... are you suggesting it shouldnt be used or are you saying its ok but there are better options? I have had a quick look at the specs and tensile strength is comparable to othe rmechanical tubes but yield is quite a bit lower.
Thanks Flyer no doubt I will be pestering you tomorrow if thats ok. It will be good to have a bit of a catch up have made a bit of progerss on that daptor plate.