Are the Speeds only good for "really restricted MTL"? If so, they're not for me, since I like my MTL'ing kind of airy.
I have two Cthulhu 1928s and at least one Etna (boy, do I need to conduct an inventory). Just put the Kindbright Novecento in my FT cart (which is full to groaning at this point). My fingers are large, clumsy, and lacking sensation, so it remains to be seen whether I'll get on with it.
The Duetto Reborn would qualify for airy MTL, but the airhole placement is unfortunately low, resulting in a lot of backflowing vapour and condensation on top of your mod. It's my least favourite because its messy (neat freak). The others are very tight and by your own description likely unsuitable. I only mentioned them here because I thought that maybe this was the Italian connection.
The 900 can do a much looser MTL. Super small chamber. I'm putting 1.5 mm ID coils in there. The return is great though. Very smooth airflow, incredible flavor and very little heat due to the massive heatsinks and many fins. Beware of that kindbright clone since mine came with only bf pins (not a squonker, had to glue them shut). Otherwise great quality and beautiful polish. Perfect fit for this shiney thread.
For the loose MTL, Ambition Mods Spiral RDA is very nice. Larger chamber for bigger coils. Modern, intuitive posts and sunken screws plus guides for the coiling rod. Not the prettiest though. Then again, that heat sink and fins are great for chain vaping . MTL can get quite hot without. At 20 USD for the original it's budget friendly.
If you want to go downright ugly, the nectar nano offers a divine MTL that you can dial up to RL. It's only available cloned anymore, but it has a large following so fasttech is full of replacement parts. Really one of my personal favourites. I own two and enough parts to make two more
Did you try the galaxies? That also ticks a lot of boxes for loose. MTL. Not gonna say anything about it, plenty of people already did.
Don't buy it's descendant, the Holic. It's impossible to get a good MTL on that with all those airflow options. It really starts at RL because you cannot restrict it while maintaining proper air pressure (they miscalculated the interaction of the 5 airholes). Just threw mine out after being unable to take it apart.