Hiya...
Not got much arc experience, but since north america's gone to sleep I'll chip in where i can. Kan't believe kami's not gotten on here yet.
1) 15/10 is better, the arcs have a wide wind range. The 10m might be better as a synergy 'cause the smaller chargers are very fast in the turns. If
you have lighter winds / heavier body weight, you might want to consider a 19/12 mix??? Even the charger is not great in light winds, none of the arcs
are... just in the design. I get lots of light winds and do most of my landboarding / static on 6.5 and 8 fixed bridle.
2) depends on your packing style/transport options. Some folks roll it all up together with the spars/bar/lines in, others pack it all down. If you
pack down all the time, then it's not much trouble to change bars. But, the smaller chargers do benefit from a smaller bar.
3) smaller bar on the 10, bigger on the 15
4) the bigger the size the less difference on a per meter basis, the percentage difference between sizes is roughly the same.
5) 4 lines.
More detailed answers need to come from the guys with direct experience...
I envy your learning curve and cash flow, you're moving on fast!
Keep it safe, bro.
fixed bridles, flying static, been two years now... ??? folks must be wondering....
sting 1.7, dp power 2.5, crossfire 3.2, ace 5, blade iv 6.5, ace 8, ace 12...
also a couple of arcs, 12 syn and 12 phanny, but i\'m not yet up to speed on them.
(13.11.09)