Thread:Qunow/@comment-25283969-20150718102156/@comment-749631-20150718133837

Note that this 1.3x ratio is a generalization over the exact number of exp.21: 4drums exp.37:5drums and exp.38:10drums. Different sites have different reports about whether to use 4/5drum for 21, 5/6 drum for 37 and 10/11 for 38, which they put up the number because they're working. The linked site's latest comment say fail were never experienced with 5/6/10for21/37/38. But I am not really sure if that is hard cap or not.