For cpab - try pytivo ... simple utility that advertises the PC folders you define to Tivo units ... has the MAK defined (not sure it really needs it) and no desktop plus key required

in regards to the MAK keys timing out - there were a few guys on the techo slack forum looking into it before xmas but no solution and not sure anyone is looking into this at the moment

bump bump .... any comments from tech leads? transferring between tivo's was a major feature used in our house and would be great to resolve if possible