On Thursday, July 3, 2014 4:04:57 AM UTC-4, Peter Higgs wrote:
At 19:32 02 July 2014, Waveguru wrote:

yes, 80mm.





Don't you need one that has been 'calibrated' to your particular glider?

Or else the White, Green, Yellow and Red bands will not be correct..



V Stall

V rough air

V never exceed.

and V flaps, if you have them.



(I suppose you could always get the small paint-brush out !)

Changing markings is no particular big deal. Winter instruments that have markings on the inner face are done with sticky back plastic tape that is easily removed and replaced. Wag Aero has the marking kit for just a few bucks.
Did one yesterday.
UH