The replacement compression springs arrived from China, the only issue is that they are simply cut from longer lengths of springs, meaning that the finish is crap, there are sharp edges & the springs will not sit flat, usually compression springs are flattened or ground to ensure that the top & bottom of the spring is level. So out came the hand file initially, but ultimately as I had a few to do I fired up the angle grinder.
Having restored a few of the RRB easels, I will be offering a few for sale, I will be keeping the 12×10 & one 12×16, but the rest will ultimately be sold, interested drop me a message.