Replacing inexpensive ShimaNO components with more expensive ShimaNO components does NOT constitute an UPGRADE
You will still find yourself painted in a corner ....with ShimaNO holding both the brush AND the bucket of paint
Positron ....Front freewheel system ....AX ....Dyna drive ....Pitch 10 ....Uniglide ....on and on, ad nauseam ....wanna be left 'holding the bag' ? = then by all means, go ShimaNO !