Hi José Glad to hear you're enjoying the Tyros. You and I indeed seem to be sharing a lot in common as I too used to need to utilize a fully weighted keyboard controller (Fatar 1176) + Roland RA800 arranger, but have since learned to adapt (quite happily) to the synth action & MUCH lighter weight of the mere 27 lb 61 note Tyros. If the BEST quality sound & styles housed in a light weight & compact package is important to you (as it is for me), then the Yamaha Tyros 'fits the bill' perfectly and well worth the short adjustment time possibly required (if at all) to adapt to playing its almost imperceivably narrower keys. Another plus to the Tyros solution is NO more backaches !