couldnt say about mags offroad but personally i wouldnt say it was a great idea but i just got some of these today and god the quality for the price is amazing
http://cgi.ebay.co.uk/Hustle-75-CNC-...item3cb53ca13a
never seen the style of frame before but engine is spot on i know loads who have them very reliable and tunable to boot my mate has had his port and polished high comp piston and z40 race cam fitted and its an absolute monster