extending coal hopper

new to coal burning this year and am loving it.no more high bills to gas company. i was wondering if i could add an extension to my hopper. i really do not care about how it looks as far as being higher than the stove. will the added height produce more pressur on the coal paddle and push the coal to fast? i have a alaska channing III with a direct vet. i would like to extend the loading of coal for a weekend or so. could have sombody dump ashes and thats it. some people do not like to do to much work so going to the coal pile with a five gallon bucket might be to much. thanx in advance for the advice

Depends on how the hopper mounts to the unit, you might put more stress on the mounting bracket or stoker unit, etc. If it direct bolts to the back, you might be able to extend it up 6-12 inches, that might give you 20-30# more capacity.

How about making a separate box you can place on a small step ladder, with a small chute 4-6" pipe going into your existing hopper, at a slight angle.