I decided to build the Lods 00 through 03 for Y type before I hit the sack, (just gone 01:00 so it's a tad late considering I've been up since 05:00 yesterday).
As it is a quite simple, yet at the same time a complex shape, I could not make a difference between Lods 02 and 03 without insurring a drastic change in the geometrics, that I'm concerned may cause a significant pop, so will need further guidance here.