Recently bought an 03 link belt 210LX excavator to clean up some building sites, groves, and fencelines. It currently has a single function aux hyd system on it now. Wanting to add a hyd thumb if possible, got a quote for 8k just in parts (not inluding thumb) to add a dual function system. Wondering if there is a cheaper/simpler way of adding one myself. We are very mechanical and would like to think we could add some kind of diverter valve and get by that way instead. If it will be too big of process we'll just add a mechanical and move on. Any and all advice is welcomed. Thanks!