I know this is an old topic, and one I researched on every internet source.
I ended up with a new Lew's Team Pro SP, and it makes a very nice BFS reel.
It has the shallow spool, made for 40 yds 20-lb mono.
The shallow spool also holds exactly 200 yds of 0.165-mm braid - my use is for inshore ML and 1/8-ounce - Or the same 200 yds in 4-lb test mono.
If you ever need a good line capacity calculator, I like the one at Pattaya Fishing, which lets you also calculate stacking lines of different diameters.
The shallow spool on the SP is far lighter than any of Lew's deep spools. I further reduced spool inertia with Hedgehog Air BFS bearings, which are currently on sale in Japan already paired for Lew's - if they haven't already sold out.
Before I bought the reel, checked with Lew's whether the SP spool was interchangeable with any other Lew's model (since I already have a few). Definitely not. The SP has the smaller SLP frame, P2 pinion gear, so no go with other Lew's models.