Most members split capsules in half by eye. From his posts it seems that Cutler thinks this is acceptable.
I purchased a similar scale but only accurate to .01g. A capsule containing 25mg ALA will have lots of filler bringing the total powder to over 100mg. So getting the capsules to within .01g seems reasonable.
Also I've found that when I split the capsule by eye, I generally get the dose to within +/-.01g.
It gets tricky for those who have to get down to 5mg or less, for example for the autistic kids.
A company that caters to those kids has 5mg capsules of ALA everythingspectrum.com
Also the folks who host the hair tests have low dose caps
Cutler says that when you double the dose you don't double the excretion of Hg. So cutting the dose in half will not slow your recovery very much. I think it is more important to be taking some of the supporting supplements--Vit C, E, Mg, Zn than to be spending all of one's $ on chelators.