I Have Been Building Model R/C Subs Before I Knew Skip Assay and Merriman Existed.
That's A Fact... I started In 1977, With Out Any Help And Had To Learn Like They did....
The "Hard Way". Spelled ..EXPENSIVE PARTS BURNED UP OR JACKED TO OBLIVION!
I Have Tried Speed Controllers For Cars Some With Reverse Some With Braking Some With
Cooling Fins and All Made By Reputable Manufacturers. Futaba, Etc.
There Are Lots Of Makers But For Rugged Dependability I Have Been Using Vantec Units
From Their Single Motor Units Running Single and Twin Motors ( Depending On Amp Draw,
Too their Dual Forward And Reverse Units (Used In Robots) With Zero! Failures.
Now I Will Admit, They Have A Whine At Low RPMs But At Geared Down Speeds They Are
As Good As You Can Make A "Near Bullet Proof" Unit Get. They Are Not All Cheap But They Last
And Some, If You Are, Electrically Inclined, Can Be User Service Able. I Have Upgraded Several
Lower End Single Forward/ Reverse Unit With More Efficient Power Transistors and They Are Still
Working ( Even After Pressure Hull Flooding ) To this Day!
So, If You Are Tired Of Playing Around...... Get A "Real Unit!
Sorry If I Stepped On any Toes...... So Move Your Feet!
Andre S. Burgess, P.E.