looking very good i think its a bit late for this bit of advice iv got a custom cage in my fouc cosworth im bilding . wot it is so you can weld the top of the cage you have to cut holes in the floor then put a strap round the bottom of the hoop then pull it in then drop the hoop throw the floor then weld the top then lift it back up then carry on with the welding and please make shower you have a stong welder so it penatrats the metal not just sit on top of the metal . all the best with you bild its looking good