hiho,I play a 99 4003 along with a musicman and a p-bass,weapon of choice is the Ricky.I set it up on delivery and haven,t touched the neck since.Not bad for 10 years.the neck is almost the same size from top to bottom which I like.
Neck set up is different to other basses,4001,s adjust differently to 4003,s but they both get zero relief unlike others which is the trick to get them singing
Pick ups are single coil which are very sensitive to your playing,you could call it expressive which means they don,t tollerate bad technique.
I have replaced the bridge with a hipshot,heresay in some quarters but I think it is an improvement in all ways.
Comfort wise once you adjust to the Ricky they are great,hipshot helps.
Ampwise they respond to good amps and cabs,you would not put budget tyres on a ferrari would you.
Russ Ryan who is Geddy Lees bass tech never adjusted the neck on the Ricky over the whole tour unlike the jazzes which were in regular adjustment.A fine testiment to the 4001 with the apparently weaker neck than the 4003.
There is nothing like a Ricky when it,s singing.