Looks good.
Would be a hell of a lot quieter with that muffler on it. Adapting one of the ones i showed it would have been as noisy as a mower.
One of the best things i ever did was go to Tafe and do a course in Arc Welding. Buy an old welder with a plunger in it and a packet of 2mm electrodes and with the Amps down stuff like that can be welded. Not efficently but take it steady and its a good enough job to go the distance.
Cheers, Bob.