New to VAX (4000/200)

I am the 'proud' owner of a VAX 4000/200. I have not tried to do much with it yet, first I'll indicate it's config, then my questions (as I'm 'new' to VAX (I admin'd one for a bit 14 years ago... but I deferred to several folk on campus as I was new to admin'ing VMS and I didn't stay in the role long enough to really pick much up)). M9715-AA VAX 4000 internal card (terminates DSSI and SCSI busses) M7626-AA KA660 CPU M7622-AT 16M Memory M7622-BF 8M Memory M3108-PA DSV11-S 2 Line Sync Comm SI-SC 1000 System Industries SCSI card M3118-YA CXA16-M 16 Async Line M3118-YA CXA16-M 16 Async Line M3119-YA CXA08-M 8 Async Line M3118-YA CXA16-M 16 Async Line M7559-00 TQK70 Tape controller are the cards present (from slot 0? (rightmost slot)) And it has 3 DSSI drives, 2 5.25" RF31 (381M) and 1 3.5" RF36 (in one of the 'rail' sets that will support 2 3.5" drives) (1.6G). the 2 RF31s are ID 0 and 1 the RF36 is ID 2 It also has a TK70. Now onto the questions: 1. How is 24M of RAM ? Should I be on the lookout for more ? 2. What releases of VMS, Vax Ultrix, etc should I limit myself to based on 24M and KA660 ? 3. Was there a DSSI version of TK70 ? 4. 4000/200 does not have SCSI, correct ? (other than someone added an SI SC-1000) 5. any idea if a SCSI CD can be booted via the SI SC-1000 ? (boot cmds would be ?) 6. This is supposed to have some version of VMS on it... I have no PW... pointers to 'break in' procedure and password reset ? What is the default sysadmin account as well ? 7. There is what looks like a 50 pin scsi terminator (small size like Sun 411 case) that I've identified as DSSI terminator., What is the 50 pin centronics style connector above that ? 8. What is a DSV11-S good for ? 9. Not that I plan to, but how do you make use of the async cards (they have 50 pin centronics style connectors) 10. Anyone got any more of the 2 3.5" drive mounting assemblies ? 11. Anyone got any RF36 or higher density DSSI drives available ? 12. Can the DSSI drive 'bus' be converted to SCSI ? 13. What is the largest drive/partitions supported on 4000/200 (DSSI or otherwise) ? 14. Have I asked enough questions ? (What have I forgotten to ask :-) ? ) How are the 4000/200 machines ? (Other VAXen I have is VAXStation 2000 and VAXStation 3100, neither of which is running (driveless))... I find the enclosure design pretty cool... and for a large box, has nice design (visually)... (I know it is no SGI... and that it is DEC beige.... but I like the design (doors, badge, etc)). Any drop in cpu/memory upgrades that are worthwhile (in the free to cheap territory of course :-) ). Thanks in advance for any cool info/pointers/etc... -- Curt