Sleeve for a tube

[puffernutter]

Stitch 3 bits of flat or round inside the extension...?

A good idea, but where it is I cannot get access with a welder, so whatever I do has to be made remotely and slotted in

 

[Hitch]

Use 3 bits of flat, and nut and bolt them/tap the flat...?

 

[puffernutter]

Use 3 bits of flat, and nut and bolt them/tap the flat...?

Good thought (not heresy on a welding forum)?

 

[mr haynes]

...or 2 bits 1mm and bend with your hand

 

[puffernutter]

Going down the split it and weld it tube route! I'll keep you posted (so to speak!)