Thank you for quick reply. I expected that adjusting a warhead size would cause a "big-bang" and therefore a solution might not be at hand. Just wanted to mention the bug for sure, one never knows
Regarding the tubes - Uragan has normally 16 tubes, which should translate according to Mobhack's Help files as two salvos/slots (8 and 8) and rate of fire 8. But for some reason game has two slots (4 and 4) and rof 4. May be it was limited to half the real number because it would be too powerful (and I agree it would be too powerful

) or is it because some special computations with cluster submunitions. I was just curious about the exception made here, as otherwise the number of tubes seems to fit the actual weapons.
Regarding the off-map: you are right. Actually I wondered, why there are even on-map BM-21s. I would rather expect all rocket launchers off-map (of course except for Buratino, which is a direct fire, or towed launchers for paratroops), but it was perhaps done for a scenario building purposes (like a paratroop ambush of rocket battalion position or so). On the other way - the more units there are, the better

Never hoped such a detailed game could survive in the age of Call of Duty (nothing wrong).