Do you need to bolt it down so it can't pull diagonally ?
and would a raised platform make it easier to work on ?
MTA i agree it has to be stiff or there is not much point in building the frame
your c channel looks much more solid than i was originally thinking i needed , time to recalibrate the thought process
the liner bottom half is like 1/2 an octagon and i find it tapers too fast, my shoulders are too tight , Kim fits fine
and the motor has the same problem at the crank centreline
so i intend putting a new bar pretty much from the feet area all the way to the back about 4" lower than the current wide point
this will mean all the vertical and angle braces on the sides will be cut and replaced over a ~8 ft length
and i think he jig should have the capability of alternate suspension mount points as i am rapidly running out of room
working with Jon on an overdrive has just eaten up another foot of engine bay
so now as i want good access without the jig blocking anything but still very stiff , in the air on a rotisserie
i am picturing a perimeter box frame braced , with adjustable supports along the sides to secure the position of the upper and lower frame rails when i release them
sometimes wonder if i should start again and sell the existing frame to someone smaller with a narrower motor