Glutamine Pre-Loading

this was talked about in the article about cell volume by bill willis.
i did not take the opportunity to ask questions in the live spill when it came out because when i read it i thought it was too much overthinking.

but then i started getting more into pumps and now i am interested in maximizing them. but the article recommends 10-15 grams of glutamine PWO. does anybody do that because that is alot of glutamine. and the glutamine is just to allow leucine to get into the cell. if you are taking 10 grams of glutamine how much leucine are you to take?
and does pre-loading glutamine mean that you take the glutamine then wait five minutes and take the leucine?