On Sunday, 11 June 2017 21:48:25 UTC+10, wrote:

I understand the theoretical issue of using a single TE line on a pressure type and flow type vario...but....what about in practice?

I can't split the TE line anywhere other than behind the panel. What if I just installed 6 feet or so of tubing between the instruments and wrapped and secured it? In reading I found the following from Borgelt:

Mike's words are very relevant. I've fixed at least 4 gliders with cross talk between the two varios just by moving the T to back behind the pilot's seat. If you can't do that, then two big loops behind the instrument panel would be acceptable. The T needs to be a long way back from both varios, so don't put a T in, run a short section to one vario and a long piece to the other.