There has been and will continue to be a
LOT of different opinions regarding these two DA machines.
My question wouldn't be...
Do I need a Bigfoot over my flex??? I would ask...
in addition to my flex???
The
Flex 3401 VRG is a direct drive forced rotation dual action polisher that does not bog down.
This can be useful in certain situations. The Flex rotates counter clockwise & some say it likes to walk.
As a professional the Flex is perfect for paint correction on hard paints or average cars.
The
Rupes 21 is unique because of its wide throw...(the distance the backing plate travels side to side).
The LHR 21 is designed to bog down (in certain situations) to prevent burning paint in vulnerable areas.
The Rupes 21 is a perfect machine for expensive vehicles because it is safer on irreplaceable paint jobs.
Each machine has its advantages and disadvantages.
So what's the bottom line. ..
The Flex 3401 VRG & the Rupes LHR 21ES are currently the two best dual action polishers on the market!
Just like the FLEX PE14 rotary & Griots 6" DA are different, the LHR 21 & 3401 VRG are also very different.
In the end, It all comes down to your personal experience, your personal preference and your budget.
If I were you, I would purchase a Rupes Bigfoot LHR 21. It will make an excellent
addition to your arsenal.
MY THOUGHTS:
My personal favorite go-to of these two is the Rupes LHR 21 with a 5" backing plate and KBM washer mod.
Here's the Renny Doyle video that
fdresq4 mentioned above
SIDE NOTE:
With a lot of the new pad/polish technology I rarely find myself picking up the rotary to get the job done.
On the other hand, I recently did a vehicle that the rotary and wool pad was the
only combo that worked.
With that said, there are constant situations where the trusty ol' PC 7424xp is the perfect tool for the job.
Each machine is different & does a specific function "better" than others. Add a Rupes 21 to your arsenal.