Hivemaker was a great help he gave me all the measurements I needed and as always was great with advice.It took a long time to make because of electronics and a major red herring which I got from the company, which I can understand by the way.It is widely believed and I was told that the metal container which holds the oxalic should be at a constant 185c thats what stumped me initially.If you watch the video of the Sulimox in action its impossible to get it to work like that in thirty seconds, at least with a 250 to 300watt heater at 185c.In order to get it to work exactly like that you need to start with a temperature of at least 230c I finally settled on 255c but there is a fluctuation in this figure due to a lot of variables.
This is how the Sublimox works all the oxalic is gone in thirty seconds,so formic it would appear is not an issue.