Yes I saw that link, reason I keep trying. Position in mine is too sensitive, mm precision. Still unreliable. Will be interesting to see if anyone else can do better. I suspect either my IR sender of the TiVo itself.

Meantime I am down another more promising track. Built an Arduino system that can read the IR codes from the remote, they are equivalent to the Pronto codes I logged. Not yet got a transmitter working (I am very much a newbie with Auduino and electronics but is great fun). I am looking to get another remote though and I should be able to hack that as a sender and use the TiVo as transmitter. This is a sledgehammer solution but should work.