My machine shop mostly does motor stuff and haven't asked them. I take all my stuff to a differential place that specializes in it and they charge about 175 if I just bring it in and hand it to them. I had that option when I first put it together and I had them set up the four tens with the new spool. I really wasn't looking to take the whole rear end out but I guess if I left it on the Springs it wouldn't be so bad I'd have to take all that stuff off anyways.