would a shelter 501 work well in a michell tecnoarm?


I have been running a shelter 501 in an Origin Live   modified Rega rb 250 on a Gyrodec and find it bright and hard-not  very pleasant. Perhaps a compliance mismatch?
Have been offered a good deal  on a technoarm but this is again a modifed rega so I'm worried. Does anyone have experience of this being a good match?  I am looking for a the neutral-slightly warm presentation with bloom that the shelter is well known for .
If not the tecnoarm then what is a good match in that price range?
rrm
I recently purchased a 501 Mk III for use on a Rega RB303 arm. Based on the results of this calculator, I added a 3 gram weight to the headshell. I have no idea if your problem would be fixed by that but it’s a cheap fix to try.
http://www.vinylengine.com/cartridge_resonance_evaluator.php

edit: i also had it professionally setup so there's that too.
i used to have technoarm/shelter501 combination.
never found it harsh or bright. contrary it was very well balanced and smooth.
you might want to adjust VTA.
thanks for the responses
I tried adjusting the VTA -lowering the arm- but it had a helpful  but limited effect
I also added some weight to the headshell-again a limited effect.
Tortilladc: did you find that adding the weight made much difference to the tonal quality??