Tests carried out at the lab' in September 1985, were made on the control / head swabs (DRH/33) from the kit, not from the actual hand swabs taken from Sheila's hands...
I would invite everyone who is remotely interested to the identifying marks, DRH/33, DRH/34 and DRH/35 in the attached document whilst bearing in mind that Sheila was right handed, not left handed. Her right hand was photographed resting on the gun, and if she handled bullets and loaded them up into the magazine of the gun chances are that she used the fingers of her right hand rather than her left hand to carry out this / that exercise. This is important to understand since the original hand swab bearing the identifying mark of DRH/33 was taken from Sheila's left hand, not her right han which originally had the identifying mark of DRH/35. If swab DRH/33 (left hand) had been examined it would have produced the results which were obtained when tests were carried out in September 1985. The same could be same, once the original control /head swabs were altered and made into DRH/33...
I would say to each and everyone of you that the hand swabs which originally bore the identifying mark of DRH/34 (right hand) was never examined at all, only the left hand (DRH/33)and the control swabs (originally DRH/35) DRH/33...