I have the MES 30 with the window, Ive googled this issue and have tried the mod where you prop up the coil so that is closer the bottom of the chip tray.
If I set it to anything under 200 degrees, it will never burn the chips, even after 5 hours they are completely unburned.
If I crank it up to 200 it smokes just fine, just not below that.
I was thinking of drilling a few small holes in the bottom of the chip tray to possibly get more heat to them..
the chip try currently (modded) sits about 1/8 in from the the coil, should I rig it so the coil actually makes contact with the bottom of the tray?