While digging through my stuff looking for something I came across a set of the early small track tension springs with the mounting brackets, so if you are restoring an early half-track and want to put the proper small springs on here is a set. $50 plus shipping, these rare very heavy so shipping won't be cheap, I found that Greyhound is probably the cheapest way to send big heavy stuff, or UPS if you don't have a bus near by. Bob Chell in Northern AZ,3 hours east of Vegas, 6 hours north of Phoenix, 6 hours south of SLC.