I purchased your unit, at Harbor Freight, and found that the chuck (collet) is a bit small. It needs to be 3/8" to fit my accessories. Do you have a larger collet size unit? I am looking for the right angle model. The store did not have the size arbor for the unit, but even so, this size still is too small for the attachments I have at home. Can you help, do you have a larger model, in the right angle? Thanks John Collins