Pls don't get discouraged. I think it's an interesting idea.
Problem would be incorporatign it. Both TOS and 2003 use vastly different tech. If you standardize them you lose the flavor, if you keep them you have to plot explain why.
A compelling story should be fleshed out (just an outline first) before worrying about the next steps.
Something like this could be very cool so keep it on the back burner.
I would dump the idea of including G-80 though...
I mean did anything from it merit inclusion (that is not an insult to TOS)?
Consider the cloaking tech. ONE squad of 5-7 vipers cloaked even for an hour (batteries last 24 hours!) could decimate any Cylon force eventually.
Not to mention the time travel. Um SCREW EARTH history... Pillage Earth for any diff tech not possessed and THEN use time travel, head back tot eh colonies (no Cylon impedance) and "gift" your ancestors with all this lovely advanced tech.
There you utterly defeated the Cylons, saved 13 planets (the Colonies and a still ignorant Earth) and didn't need to fire a shot!
Seriously I can barely think of G-80 issues without developing a brain anuerism!