We ran our CD22 with Honda twin 40’s with trim tabs, but not Permatrims for 9 years, then in 2012 added them & they made a major improvement for our three month SE Alaska cruise that year & all our cruising the next 7 years. In 2019, we repowered to Honda twin 60’s & the Permatrims for them were much larger, than for the twin forty’s, as they will fit Honda outboards from 60 to 150 hp. There can be a lot of pressure on the Permatrims. On the twin 40’s, I used bolts & 5200. When, I had to replace the lower unit casing on one of the 40’s, I sure regretted using the 5200, so with the 60’s considered bolts & 4200 & ended up with just the bolts. They have held up well, the past 4 years. As Bill said, it’s very important to where they ride in relationship to the water surface & also their exact alignment, when mounting using the bolts.
For how we use our CD22, the combination of trim tabs & Permatrims has been a major improvement for boat handling & comfort over just the trim tabs.
Jay