RE: First sidelock on it's way...
Congratulations on the sidelock. My experience has proven to me that, except for their removeable breechplugs which aid cleaning, an inline possesses little, if any, advantage over a good caplock.
I have had some difficulty with Maxi-Hunters, however, being unable to get accuracy out of them in .45, .50, or .54 caliber. But I do find the original Maxi-Balls to shoot well in a couple of my slow-twist RB barreled caplocks with heavy charges.