RE: New QQ-Yak 86"
Rezagh
The other difference between the two is The TD is 55mm dia and the K is 70mm dia this would make a difference to the width of the chamber if it has closed side's. Is it a closed compartment or open to the atmosphere? does it have a width restriction? sorry to ask all this but my 85" Yak with a BCM wrap around is so noisy its got to go, even though its flys like no other.
Mike