"There is no Schleicher TN on flarm installation, which will make your life easier."

There's nothing specific to FLARM but TN 02-2008 16.01.08 provides guidelines for installing additional equipment. This will actually make my life easier as it gives something for my AMO to refer to when documenting the installation. Having to make up the installation standards from scratch, get them approved by Transport Canada and hoping they consider it a minor mod would be a headache in comparison. The standards in the TN are pretty much common sense things that are what I would do anyways (if something's heavy enough to injure you if it breaks free you secure it well, don't block any of the primary flight instruments, use a fuse or breaker on electrical equipment etc. etc.)

Of the vario/nav systems I'm interested in I've been told the LX 7007C Basic won't display PowerFLARM but the LX 8080 Simple will. That's probably the one I'm going to buy. I'll still be using the dedicated 57mm Butterfly display with it.