Hi
When I did mine about a year ago, I did degrease the bearings as I read somewhere that mixing two different types of grease will not be good especially with lithium grease as it seems that they do "dry out" over a period of time
The worm bearings were changed to a sealed ceramic-type (these are actually same size ones used in roller skates!) with Abec7 classification - cost a bit more - bought mine from
VXB in the US - did not change the tapered and main radial bearings as they seemed OK
Before the hypertune I could only get 30secs unguided subs but after it went as high as 300secs unguided if everything is well balanced "east-heavy" and not windy conditions - I was happy I did it!
Sold the unit since and will be working on a newer one soon but this time I will be changing the worm as well as the transfer/spur gears for the motor/worm with 64teeth ones made by
AeroQuest (attached) - this will tell if it will make improvements or not since the new EQ6 Pro (white livery) is totally unusable if unguided
Cheers
Bill