Hi,
Just started to use glyphs for a Thai and I realised there are not poPla_maiHanaKat-thai, foFan_maiHanaKat-thai and foFa_maiHanaKat-thai in the proposed character set.
It is important to have those I think, a design alternate for those combinations will be needed in most cases given that maiHanaKat-thai might not sit well together with poPla, foFan and foFa.
cheers!