hopefully someone with more experience will add to this, but I thought 8 weeks OOP was the rule. so that would be 2 months and 2 weeks.
if he was 10 weeks OOP when you got him and you have him 2 weeks then thats 12 weeks OOP. I would think a milk replacer would not be needed for a glider this old.
but you should get a second, more experienced opinion.