Roller Replacement Set -- anyone use this on a Happs 3"?

[willhs]

I guess the title kind of explains it all.  I noticed that people have used the booster kits with Happs, so I'm planning to do that, but I'm wondering if they roller replacements would work as well?  I saw somewhere that Betson/Imperial trackballs are basically the same, but I'm not sure if the rollers are the same.

Thanks,
Will

[BobA]

Atari and Happs are the same and Wico and Imperial are the same.  There are differences between the Happs and Wico roller/bearing sets.

[willhs]

Okay, so they wouldn't work, then?  I think that's what you said, but I'm not sure if I'm reading you right.

Thanks!

[BobA]

I think there are small differences that make them not work since they are listed separately when you buy them,

[Kaytrim]

The difference is how long the spindle is from the roller to the optio wheel.  Happs are longer.

[willhs]

So the rollers don't work, but the booster kit does work with happs?  There are a few posts that talk about using the booster kit.