I had lot's of trouble with the plates bending and gripping the keel , even @ 3mm.Today's abuse of the metalworkers art involved the addition of some side-plates to the seat mount that I had hacked off the frame where it had been permanently welded on.
As a "rework" it looks less than pretty, but it will work ok. It is a tight fit, so I might need to flap-disc some metal off the inner faces or it will be likely to scrape the paint off the keel.
I used 3mm plate for the side-plates as I have found that lighter gauge metal just "bows" and distorts when a clamp bolt is applied.
I do need to work it out properly before applying grinder and metal-glue.Dan
You do like to build them long , not sure if that is a good idea ? it did not work out for you last time ?
Of course it is not obvious that as well as being higher 24" wheels can also make the w/b longer to get clearance from tyre contact.
Can the pivot not be mounted behind the seat mount ? assuming the crown jewels do not stray in front of it ?
You may be right paul. But the idea is to weld a 25mm tube across them, into which are inserted a 22mm bar on each side with pinch-bolts.Dan
Are you welding yourself into a corner ?
If twas me I would have welded a 3mm plate fore & aft with 2 bolt holes and used 2 U bolts to clamp it ? room for adjustment and stuff ....
Maybe I am paranoid about adjusting/changing stuff , I suspect there is no cause to answer that