David Uden,a friend of mine from Omaha,Nebraska,has a Sonicweld Swingarmed frame that Ray H.built for an Expert Racer from Fort Worth ,Texas. W.T Ruffner #74n at that time. It has a long rod ,route kitted T120 750 in it. The swingarm is a built up diamond shaped cross section.Tapered to the Duck plates.The glass is the basis for the trackmaster tank and seat. When Dave bought it it was rusted out under the frame rails in the down tube/cradle area. So ,it was off toour Buddy,Fred Cuba at Fred's Speed and Sport in Hastings ,Nebraska. Fred fabbed new frame rails and down tubes of 4130 and tigged them in.Wonderfull peice of work. Looked like it had never been repaired.This is the only one of these frames I have ever seen.anyway,after replating,the thing looks like a showbike now. I had the opportunity to ride it at Norton,KS about 10 yrs ago.apart from DAvid being a foot and a half taller than me it fit perfectly. Ha Ha. anyway,I did manage to get it into the main event. Ran last in the main. not the bikes fault.It handled great.I was just too short in the squat and couldn't hold it in the corners.Ray Hensley also built and developed the Star racer 650 Yamaha frame which was not a great succes,due to the fact it shook so bad at speed it spit you off. Not a great 1/2 miler,but worked good on short tracks. Whew,didn't mean to get carried away. I'll shut up now,