Wayne,I had created a thread on water removal when I got my Shoebox compressor here:https://www.gatewaytoairguns.org/GTA/index.php?topic=120744.0There is a lot information for you to pick from. I also documented my thought processes and ideas, my research on various topics, what worked, what didn't and the costs.I found and use a membrane drier for my moisture debulking for $80 on Ebay. It brings the dew point down to -4° F. That's 3.98% relative humidity at 77° F. It lasts up to 10 years of daily use, requires no maintenance or electricity. It has a constant, controlled air purge to expel the moisture that it separates. It also needs clean air so that the membrane does not get contaminated. Dirtier air will mean shorter life of the membrane. 5 like mine just popped up for sale:https://www.ebay.com/itm/NEW-SMC-IDG1-N02-Membrane-Air-Dryer-1-4-NPT-10-LPM-Air-Flow-20-C-D-P/123450891654?hash=item1cbe3f1d86:g:Y4AAAOSwRIFb0ooU:rk:37:pf:0They are the perfect size for our Shoebox compressors. You can submit an offer for $80 and see what happens.Otherwise you can use bigger quantities of silica gel for your moisture debulking. Silica gel works best at the higher humidity levels but not good at lower moisture levels. I've attached a chart of absorption rates of different media. Since the Shoebox uses very little air the dwell times of air in the desiccant are very high which is good.Thanks,Taso