True, their website doesn't seem to contain that info, yet. But it is in their price list. Also they split information between the enlarger pages and another page about their enlarger heads, which can be fitted to third party enlargers.
If you find the dedicated page about their Primos heads you'll see the available wattage depending on the largest usable negative size.
When I talked about this not looking like a factory line but hand assembly I guess I ímplied as much. My LPLs outside is made from pretty thin metal sheet. There is maybe a chassis underneath. But these 'panels' have surely been pressed into shape by specific tooling, which gives it ridgidity. Also the LPL column has a more complex profile for ridgidity than the simple rectangular profile of the C120 column.
My enlarger looks like it has been build with more generic techniques. Classic locksmith(?) work. Cut, bend, some edges possibly welded together, and the whole thing made from such pieces. I expect any skilled metal workshop could work on these enlargers in 50 years, even at a remote place. Although I don't see much that could break. Perhaps corrode if you throw it into the harbour. The mechanism for rising the dichroic filters into the light path will be the most delicate part.
My table is set pretty high and the ceiling is quite low. The column still fits. But I can't raise the head all the way. 24cm x 30cm paper is my usual format. I also like 18cm x 24cm. I have an unopened pack of 30cm x 40cm Adox MCP. I consider this my size limit. It is also the limit of my Nova. Honestly, that is already a pretty useless size and it should work with the 100W model. Exposure times, so far, haven't been excessive. Even for 35mm film and this 4x5 box. That being said I was gifted a roll of 65cm * 3500cm Multigrade IV RC paper and a few very large trays. I wonder what I'm going to do with it.
And you are right about the modularity. My CVC (colour variable contrast) head is in the price list, but price only upon request. Perhaps not the most often asked combination but they delivered.
The 12V 100W lamp is the same my LPL is using. I can keep the spares.