Okay, I know some of you are wrenches out there that work in bike shops so this is for you.

I'm building, or trying to build a set of NOS wheels for my 6-speed Stumpjumper Comp.
The hubs are Shimano Deore XT models FH-M730 (rear) and HB-M730-F (front). NOS
The spacing is 130mm and 100mm respectively.
The rims are new Mavic F519s.
I'm probably gonna go with 15 ga. DT spokes.

Can anyone tell me what spoke length I need? I need the correct length so I don't have to take them to get cut and rethreaded. Extra money!

I know there are computer programs that wrenches have privy to that I do not. I've tried several spoke calculators online but I cannot supply enough of the technical info that is needed.

TIA

Scott