Thanks for the pics, Elessaria!
Unfortunately, the 3DSC doesn't think the chasers are going to work out. In large part, this is because we're not convinced of the actuality of the "cabin" immediately before the mast. While the documentary evidence is thin (2-3 models and a couple engravings), we can't find anything to support this construction: All sakolevas we've seen are either flush-decked, or have a slightly raised deck immediately in front of where your "cabin" currently is.
Without the platform, your guns wouldn't safely clear the bows. Even with the platform, you'll need a windlass somewhere before the mast, and that is apt to preclude the use of chasers in and of itself. It looks too short to allow for the guns to recoil as well. (Were the game set in 1770 when sliding carriages were coming into more common use, this would be less of an issue.) While we had hopes for this, we have to concede it's a bit too much of a stretch.
All that said, you'll want to rework your decks to follow our known examples a little more closely. If you can find a way to "convert" the chasers into broadside guns, feel free, though it looks like recoil would still be an issue here.
Also, you asked how the sprit would be attached to the mast. The answer can be seen
here: a sturdy pair of triple-blocks bolted to the mast and lashed to the sprit. As clarified
here, there would be no parrel. If the sprit needed to be lowered (e.g. riding out a heavy storm) this would be achieved by slackening both the truss and the topping lift that holds the spar at an angle. There appears to have been a
lift used as well, to take the brunt of the sprit's weight near its pivot and help prevent its bending.
Happy modelling!
