similar to those of us who have made custom plows, and thus shoveled off the deck with our crawler
I like the MG996r servos. sometimes you can get them threw hobbypartz.com (when in stock) or you can get them off ebay, tho that way they ship from hong kong. but they are cheap, metal geared and stronger than the stock ones. when I buy off ebay, I pick up 4 or 5 at a time. Seriously, they are like $9 shipped.