Oh dear, the new big chassis uses a brand new mother board containing all of the Ultra SL circuits ([eight regulated power supplies, line and optional tone control circuits, optional phono circuits, and mute circuts) with a full ground plane layout.
Thus there really is no way to "move" a SLR in the small chassis to the big chassis, as there is nothing useful to move.
The only upgrade path would be to sell the small chassis version and start over.
Sorry about this.
Frank Van Alstine
