Glad you managed to eventually get back into the forum Kev.
What I especially like about the rules is that they are so easy to adapt for any unusual situation. So far I haven't actually tried them for ACW but they have worked well for Crimean War and the Russo-Japanese War which was our latest outing. I might be trying them soon for the Franco-Prussian War.
Personally I thing Confederate cavalry should be heavily penalised for dismounting as historically they seemed to be very reluctant to do so.