Hi Alan, I’ve just bought my first melodica which is the alto 37 MyLodica. Looks very nice as everyone agrees but very disappointing to find no spit hole. Someone suggested the angel melodyhorn 37 as being the nearest thing to it. I thought of buying one and then inserting in the wooden mylodica case and adapting the wooden case so the valve on the angel can function. I don’t know why The MyLodica makers didn’t do this themselves. Moisture build up is very quick and as pointed out can warp the wood. I did wonder if I could open up the valve they have blockedoff/tampered with/cut off on the Mylodica and get it goinga. Have you thought along these lines at all?