Welcome Woodster. Very helpful and knowledgeable lot on here, so + whatever number we've got up to now re both the Niqa and the Pegas blades.
BTW, with a Hegner you have a VERY well-made machine, and with the right blade it'll "make a meal" of cutting any ply up to at least 22mm, if not more.
Send me a PM when you can (I think Forum rules are that you have to make 5 posts total before you can) with your E-mail address on it and I'll send you a 3 or 4 page chart with full blade details. It just so happens that my chart is from Pegas, but there is little difference in blade numbering and sizes between all the good blade makers. The chart is in .pdf format so I can't post it here (Forum rules again), hence the request for a PM with your personal E-mail address.
AES