I built my twin sticks out of two half ton shifters from the junkyard. You just shave the two main pivot points on the shifters narrower so they will both fit on one of the bolts that hold them to the transmission. Then you bolt a piece of pipe to each plunger on the t case. Then connect the bottom of the shifters to the plungers with some kind of pivot points such as turnbuckles like most people use for windshield braces. (I used tie rod assemblies from a junk snowmobile) We had all the parts lying around from previous projects so my twin stick project was completely free.