I had a Baker for 20 years and all I ever did to it was change a fuse every now and then. If you are going to change it out, hook up and use the hitch to hold up the TT. much easier than trying to put blocks under the TT or A frame. You can use the bolts the old jack had but I recommend using a star washer for a good ground. as suggested above get a 3500 model, costs more but you can always take it with you when you trade up to a new bigger TT. when using the jack, do not change directions instantly, stop and let the jack rest for a second or two then change directions. you won't blow so many fuses that way and/or ruin a motor either.