I went down the road with my 4001. If I had to do it over again I would leave it alone.
The original bridge was fine on mine, but the E string was sorta of card boardy and woolly. First mod was a Badass bridge and a set of Alembic pickups. The original install sounded fabulous but I wanted to be able to set the strings about 1/64th lower. The luthier took off another sliver of wood and it killed the tone.
The luthier took out a bit more wood and installed a thin piece of composite material under the bridge. At this point the tone was about the same as it originally was. I played it for several years, but I wasn't really happy with the variable filter of the Alembic pickups, or the sloppiness of the E string.
Eventually I sent the preamp back to Alembic to be converted to standard Bass and Treble controls. Ron Wickersham called me to discuss exactly what I wanted and there was no charge. Simultaneously I sent the bass off to Boogie Body Guitars to have the Badass replaced with an original 2-Tek bridge, which involved cutting a hole completely through the bass's body. I turned out to be a tough job because the mounting depth of the bridge is too thick for the Ric, so they had to make a spacer. I also asked them to install a battery compartment, so I no longer had to unscrew the jack plate to replace the battery.
Well the 2-tek is super heavy so the bass no longer has neck dive. It's also has a lot less hum since the Alembics are active. It's actually a pretty cool and unique sounding instrument...but it doesn't sound anything like a Ric. It was my first bass and someone will be both thrilled and then disappointing when it is eventually bought at my estate sale.
I didn't get the bass cheap, and over the years I spent about 1.5 times the purchase price on mods. The bass is worth a fraction of what it would be worth if I had just left it alone.
By all means, it's your instrument so do what want with it. Just don't do something you will regret down the road. IMHO the best mods are the ones you can undue if you change your mind.