Iam also doing SCW in 10mm. I found that Irregular Miniatures has a nice set of rules for the war.
If you like Rapid Fire there is a SCW supplement out there. It also looks like a good set for 10mm.
I can second Irregular Miniatures ‘Que!’ rules - had many entertaining games with them. Their systems are forgiving as far as unit composition is concerned, will suit any scale, and retail at £1.10 for both pages ;-) SCW is attractive to me for the juxtaposition of old & new tactics & materiel, volunteer and professional troops, and the general lack of efficiency on all sides. The wide variety of uniforms doesn’t hurt, either!