Shortening an arbor is indeed a tough job. Congrats on your success!

Although we don't have a 2MT-6JT arbor, others faced with shortening a 2MT arbor can look to LittleMachineShop.com for a solution. We have arbors for 2MT short to 2JT, 33JT, and 3/8-24 thread.

Details here: http://littlemachineshop.com/product...rbor+2mt+short

Cheers,
Carl
LittleMachineShop.com