Trim Tabs

[wtenglish]

I want to add trim tabs to my 20 SF and have found out the only two brands that I can make work due to the flotation bracket are the Lenco High Performance and Volvo QL. The Lenco is more than twice as expensive as the Volvo so my question is the following: Can the Volvo trim tab cross a strake that steps down? Their manual shows that it can cross a strake that is in the same horizontal plane but doesn't mention anything about a hull that has "steps" like the Seacraft.