boodalu-
I've heard all the issues before with Trollin' Tabs, and I think they're valid.
If you want to add electric trolling capability to your Tomcat which doesn't have space for tabs anyway, you might consider two Engine Mounted Trolling Motors instead, which mount on hydrofoils mounted on the engine anti-ventilation plate:
Click on the photo to go to my album and see more photos of the installation.)
There's a discussion of the topic
HERE.
The biggest problem with this approach is the electrical demand of the trolling motors. They take about 0.8 amp per pound of thrust developed. My 44 pound thrust Minn-Kota EM-44 uses 36 amps at full thrust. To taake care of this, I added a third and fourth group 27 battery for it as well as a Honda 1000i generator and a 40 amp charger. I can run about 3 hours before the battery voltage drops enough that I think it wise to recharge, although I could run 5 hours.
The different trolling motor manufacturers make engine mounted units of up to 165 pounds of thrust, the larger units being made up of two or three motors mounted in parallel on a bracket.
I don't know how you want to use these, but be sure to get the salt water compatible ones for use in salt water. Will you be able to tilt them up out of the water at rest or have them dry on the trailer? Marine growth could be a problem. Using them in weed infested waters might be a real problem.
Hope This Helps!
Joe. :teeth