The crown straw tweak works very well for clean drops time and time again, as well as programming your fast and low speeds.


Florescent lighting can do a number on the chargemaster, hence not only be close to one to cause problem, being not on  a dedicate circuit, but plugged into one that has a florescent lighting shared with it instead.  I bring this up, since most rooms will have a circuit or two back to the fuse box, with everthing including lighting, on the same circuit.  

The chargemaster does have suppression/filters in it as part of it electrical works, but can only do so much when the power being feed to is a mess instead.
So if worse comes to work, look at getting a line filter (not surge protector) to clean up the power being feed to it if needed.

https://www.amazon.com/APC-2-Outlet-Mount-Power-Filter/dp/B000OF4R8C

The prongs on the crown of the straw allow for more control on the grains being dropped with the scale goes into  last of the slow rotation mode and stops, and will end up with a lot less rejected over throws that are slightly over isntead.  Hence when its trying to throw the last grain, there is enough one  the  botttom crown that that will drop off it during the slight last tune, instead of the slight turn under up pushing way too many grains on the last movement isntead.

Watch this, and see the tube pushing clumps out as the last of the turns isntead. And yes, without any straw to begin with, it's much worse isntead.

So during the final last of turns, you trying to get the machine to  drop single grains at a time isntead.




Note, Erik has fitted a polished cartridge tip to his machine to do the same as what the crown stray is doing instead.  Hence the polished cartridge tip end channel is higher than the bottom of the channel, and gets the powder grains to line up in a row as they reach the end of the tip during the slow final rotations.

So during high and med speeds the stock threaded ID tube works fine for this, but it during the final low speeds that you are trying to get the machine to drop a single grain at a time instead.

Was thinking more on the lines of a large tube for your fast and med speed as it is now, then a small tube Teflon coated (where the grains could not stack against each other side to side) that was counter bored the last inch for your slow speed isntead.  Hence part of the straw trick is to reduce the ID of the tube to begin with, and get a slick layer under the powder that allows for it travel smoother across the surface on the last of small click rotations instead.