Material Support | You can now use materials from all versions i.e. 1.8 all the way up to and including 1.15 for your elevators! This should not affect your current setups. You can still use e.g. - 'Carpet:14, Wool:11'; even on 1.15.
To make this possible, Simple Elevators uses a heavily minimized version of XMaterial (SEMaterial == 1200 lines. XMaterial == 2030 lines). Thank you to @CryptoMorin for taking the time to make this possible!
Requested by @Stoniasawsome; thanks and thank you for your patience!
Here's a short gif showcasing the use of some of the new slabs from 1.14.