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Rega RB300 tonearm VTA adjusters

I'm planning to install a VTA adjuster for my Rega RB300.
Which is considered more accurate ? J.A. Michell or isokinetic ?

1. http://www.ebay.com/itm/REGA-VTA-ADJUSTER-FINGER-NUT-BY-J-A-MICHELL-/330315748008?pt=US_Record_Player_Turntable_Parts&hash=item4ce85a52a8

2. http://www.ebay.com/itm/ISOKINETIK-ISOVERT-VTA-ADJUSTER-PLUS-SPEED-NUT-FOR-REGA-/180685503343?pt=UK_AudioTVElectronics_HomeAudioHiFi_Turntables&hash=item2a11b1fb6f
triskadecaphobic
triskadecaphobic OP
33 posts
 
I got the isokinetik VTA adjuster for the Rega RB300 tonearm and found out that the thread did not fit the RB300. While the original nut fits the the thread of the RB300 beautifully the VTA adjuster doesn't.
Thinking it's a matter of bad thread I sent it back to the dealer and we agreed that he will ship me the "Michell" one instaed.
guess what ? ...The "Michell" didn't fit either !
Is it a case of both having bad threads or does my 1990 Planar 3 have a different thread than the one nowadays VTA adjusters are designed for ?
jperry
1,408 posts
 
Interesting. I think you should call Pete Riggle. He is a nice guy and might be able to help you.
triskadecaphobic OP
33 posts
 
I called Michell Eng and they agreed that I'll send them back the VTA adjuster together with my original nut. They'll speachialy produce a VTA adjuster that will replicate the thread of the nut that I have.
jperry
1,408 posts
 
That is great customer service from Michell!
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