I'm presently using an 8" Dai-ichi full range driver mounted on a DIY Folded TQWT enclosure for my 2a3 amp, using the MathCad sheet of Martin King. If any of you are interested, I can send you the basic design.
By the way, not all 8" dai-ichi full range drivers can be used for this enclosure design.
Also, I've posted some tweaks on this particular 8" driver on Wiredstate.com.
Cheers.
Jon