Are Burhoe Acoustics Drivers High or Low Compliance?

[fifth beatle]

I have the raw Burhoe Acoustics drivers(White) and will need to build cabinets. Original design called for port but was hoping they are high compliance so that I can go acoustic suspension.

Secondly, I recently visited the Allison forum here and noticed the Model 4/5 has up-firing driver with tweeter front mounted. What would the effect be (good or bad) if I mimiced that design? Trying to learn all I can before jumping in to the fire. BTW, I saw Winslow Burhoe's Direct Acoustics used sloped up-firing driver and tweeter with vented bottom.

Thanks,

Fifth Beatle