Thanks...I'm having the MTK installed in 2 weeks on my 194. I took one of the side panels off and it didn't give access to underside of hull.(there was fiberglass wall behind the panel) Mine is a few years older than yours, so perhaps they are built different. I took the speaker out and it provides some access, but I am afraid on mine they'll have to cut a small hole to get the access they need.
Good to hear the hull thickness is good. I think my installer is going to add marine grade plywood under the mounting brackets for added support.