Don't fix what isn't broken!!
But the RIP-CORD,QAD ULTRA HD and the LIMBDRIVER are the ones I would look at.I have been using the RIP-CORD for a few years and have had zero problems with it,although it will drop on a slow let down as does the LIMBDRIVER,where as the QAD ultra's all models will only drop when the bow is fired.I would recommend looking at these,They are all GREAT rest, and there are alot of other good ones out there,if you can go to a proshop and look them over,there like everything eles everybody has there favorite and you will have to find yours....... GOOD LUCK!