new home build - variations out of pocket

hello,
i am starting a new build with metricon. the HIA contract was initially signed and I have come upto a 50k of variations on top of the initial contract. The bank had approved my loan on the initial contract. So I am planning to spend the variations out of pocket. My question is that Metricon is going to ask payments in stages 5%, 20%, 20%, 25%, 20%, 10%. Can I plan to send the variations in these stages too ? (i understand that this is a question for my lender, and i am planning to ask them). I wanted to check if anyone had paid variations in stages.

The reason for the ask, is I understand the lender would want to exhaust my cash before they pay. And I agree to do this for the original contract and not for the variations. Any comments ?

All of my variations stated which stage they had to be paid in.

Most were in the fixing stage, but a couple were at the slab stage.

Check the variation document and see if it states anything.

The HIA contract states that a variation "...must be paid for with the next progress payment, except that any credit to the Owner will be deducted from the Final Payment."

thank you.

thank you.