After training on Tuesday Colin revealed that Chris Armstrong and John Piercy are now doubts for his starting line-up, while regulars Johnnie Jackson and George Snee are away with England and Ireland respectively.
"We had a team, but there might have to be a few changes now," reported Colin. "Chris Armstrong got the flu and didn't train this morning, so we don't know about him.
"Johnnie Piercy trained, but then had to pull out towards the end, he was going to play a bit of the game as well, so we don't know about him either. We're sort of back to square one again and don't know who's going to play.
"Some of the young boys from the under-19s are going to be with us so we'll have a fairly young side.
"Stephen Clemence, Leo, Gary Doherty and Lars Hirschfeld will play, added to that will be a majority of young boys and Steven Ferguson.
"Johnnie Jackson and George Snee are on international duty. It's not like we're making do - it will just probably be the ones who will make up the reserve side next year."
Colin Calderwood may be forced to alter his team plans for tonight's reserve clash against Fulham at Woking Football Club, kick-off 7pm.