The popular SCW rules by Peter Pig are now available in PDF format too, for £9.00 GBP. These rules are specifically written for the SCW. This means they focus on what matters. Rather than simply an add-on to a set of rules written for a completely different war.
This is a gridded game from PP, the masters of gridded miniature rules since 1992.
Here are some links that may be of interest:
peterpig.co.uk/info%20SCW.html
peterpig.co.uk/pdf%20rules.html
peterpig.co.uk/videos%20of%20game%20mechanisms.html