Huh. Just realised that LB-X ACs are supposed to be 1-point clusters too, hence my eyebrow raise over the Silver Bullet, since I would have sworn blind they were 2-point clusters (I had to check all three older version (TRO 3050 original, BT Compendium, BT Master Rules) to convince myself). Guess we house-ruled from the start as that being too many dice-rolls - I know we'd had a period where we made SRMs by 4-point clusters, but...)