I got a PM wanting to know how I made my straight shat, well here it is, I gota alluminum paint roller extention handle, I used the upper part, 5 nylon bolts and wing nuts, a 4 inch PVC cuppler, for the arm rest. I drilled the hole for the spring loaded pin, in the up shaft, so the lower shaft would lock in, and used a racing bike handle, bought at walmart for the handle on the shaft. I layed it all out, marked the holes, drilled them, and put it together with the nylon bolts. Less than $20.00 Here pictures. Grubstake