There is a mod to the warthog stick that will make is so smooth you will think you are caressing a babies bottom.
After getting mine I wasn't happy with its stiffness, which is due to the heavy top spring TM uses.
Partake at your own risk, I assume no responsibility if you screw the pooch.
This does require a slight bit of disassembly, unscrew stick and remove it. Remove 8 small Phillips screws on trim collar, under the collar are 4 more screws these hold the unit together so as you remove them the spring pressure wants to rise the housing up, once you get the main housing apart, lub up the joint with some RC differential lube make sure its plastic safe. Now the secret I found the main spring (yeah the hvy one is what is causing the problems) so you discard it, remove two of the lower springs which the floater plate rides on and the hvy main spring presses against. Go to the local hardware store and grab you a couple assortments of 6mm inside diameter x 1"& 1.5 ", this gives you adjustability to suit your play style. With two of the original springs under the floater plate try one set of springs I would suggest the 1.5" set first place them opposite the springs resting under the floater plate, meaning if the lower springs are at the 6-12 oclock position, place the new springs at the 3-9oclock position on top of the floater plate. Button it back up and you will not believe how smooth she is now. It still self centers, if you throw it to the side and let go she pops back centered but softer then original, as a bonus side effect the dragging a lot of players experienced with the warthog disappears.
Just to make this clear, you end up having two (2) of the original springs under the floater plate @ the 6-12 oclock position, and two (2) of the new springs @ the 3-9 oclock position on top of the floater plate, one spring on each post, not two springs on each post, total of only 4 four springs in total used, 2 under and 2 above the floater plate.
The original pressure spring Tm uses is so ungainly for a flight stick, but I can understand why they did it, bullet proof. They have to supply a product that even an ape won't break, remember those ads for Samsonite luggage, the one where a Gorilla was using one to play with, yeah >>>> bullet proof.
If you need help in disassembly search you tube for Warthog disassembly, there are several vids, but everyone is still using the original spring on re-assembly, I found replacing it and removing two of the lower springs makes this stick come alive in your hands.
Again attempt this at your own risk, I assume no responsibility if you screw it up.