The PAS ad is probably Efly, they have been looking for TRE/TRIs for a while.
Efly is on track, just dotting the I's and crossing the T's from what I hear.
Not sure which Irish-resident pilots are with Nex, last I heard there were none, and at least three of their ex-pilots have signed up with Efly.
Some -200 series 146s had -100 series landing gear fitted, which limits the MTOW and MLW. You can tell by looking at the main U/C upper web, the normal -200 and -300 item is solid, but the earlier -100 series has big lightening holes in it. It can get particularly interesting when doing long sectors in the 146, as the MLW can be less than what you end up with on arrival, particularly if you have more than minimum fuel on board due to wx considerations. You then end up having to either burn fuel or get "creative" with the fuel log. This is mainly a problem if your destination alternate isn't close by. Flybe had this problem, the one aircraft they had with the lightweight gear couldn't be used for some charters because if you arrived at destination with minimum fuel and a full pax load, you were well over your MLW.