Hi Stuarts,
A bit late to the thread. I have an Altair 100mm which I'm very happy with.
As well as the supplied 18mm I've bought a pair of 10mm Altair 10mm flat field eyepieces which work also work very well.
I have it mounted on a Fotomate tripod and head which gives easy fore and aft movement for balancing, I can give you more details of it if you need.
I have the 45 degree version. Mods I have made are to reverse the mounting arm on the bottom of the bino to get better balance at high elevation and removing the carrying handle to fit a red dot finder, the latter is a big bonus.
Cheers
Martin