Very few,as the panels have probably went bad and as many as 4to 5 attempts when making were the norm as they were so big and hard to tame resonances.. The larger panel was a nightmare t make..
The Neolith was stemmed from it as well as the Monolith being a Geneses of all! Seems the beloved by many CLX are now a red headed step child as it was a one model design, Even the CLS had 5 iterations .. Maybe triple spar was to hard and not as beneficial at 55hz the cut off