Maybe you will have an use for the aerogel during the last batch of contracts.
But I noticed that Samuel now ask quite often in his deliver tasks for the exact amount of material needed for the next build contract.
#52 & #53 deliver 7,9M wood and 490k borax needed in #54
Previous contractors and also Samuel in the first 50 tasks normally ask for less to deliver than later needed.
#31 & #32 deliver 6,5M titan , 5,9M silicon , 390k aerogel and 290k xenon
and in #33 you need 7,5M titan and 7M silicon and 450k aerogel
and #34 need 348k xenon