Not sure about Lenco, but I do know that Bennett customer service is the best you will find in the industry.
If you discover that you need extra hose, an extra long fitting (for an extra thick transom), or even longer actuators to position the hydraulic fitting higher on the transom, Bennett will swap out your parts for the parts that you need, no charge.
My yard installed my tabs for me and I did not know they were using the same hydraulic pass-thru that were used by the boat levelers, so the hydraulic line was run external.
Had I known, I would have swapped my actuators with Bennett for longer ones to make the hydraulic lines internal, rather than external.
Fortunately, the yard did a good job, and other than appearance, they work just fine.
As you can see, my boat could have easily fit 30" tabs, so what you use is up to you.
These 24's have been a huge improvement over the 12x12's it wore before.