I've heard from a few owners who did the upgrade and love it. I don't know the exact nature or scope of the upgrade they did though. Can you do it in stages?
MDx - $1250 - provides for native DSD256 with USB, and greatly improved Master Clock Sync.
M1 Series 2 - $2500 - replaces most of the chassis parts to larger ones to house and the larger power supplies that are both found in the M12/21 products.
SE upgrade - $1000 – adds stillpoints, hard wiring, fuses removed, and resetable fuse added.
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