The point being that all this is a waste of time. There is no education here since there is no practicality to this exercise of trying to make a super meter in an OM-1.

Use a hearing aid battery, or use a diode to convert for a 1.5v battery, or use a CHRIS/MR9 adapter, or just use a 1.5 volt battery and compensate, or just turn the meter off and use your senses.

cost (high) / benefit(low) = bad ratio