what kind of turnouts should i use for my steel mill and mainline the mill will be serviced by 4 axled deisels with steam engines and large 6 axled deisels like E-6's on the mainline dropping off materials. i was thinking that i should put #4's for the yard since only small deisels are there.and #6's for the mainline and branchline work for my lare 2-6-6-2's and 2-8-4's and E-6's in such.does this sound correct or should i bump up the yard turnouts to number #5's? oh and if this helps i dont plan on running my e-6's or any other 6 axled deisel in the yard , only on the mainine for loading and unloading.