I think Menmuir and Gow were already at AG when the Ritchie brothers arrived.
It didn't work out for Menmuir, although i think he did play for the first team a couple of times. He went back to Scotland (Hearts I think), same as a couple of others at that time - Jimmy Brand (Morton I think) and another whose name I forget, both Scottish schoolboy internationals. City had a production line from Scotland in those days with Tom and Gerry (!) being the jewels in the crown.
I think City were initially after Steve as he was seen as a rising star at full back having played for Scotland schoolboys, but Tom turned out to be a legend for City and Steve went back to Scotland. He played in the Scottish cup final for Aberdeen before coming back down here and playing for Torquay and Yeovil.
Seems the production line is now the Channel Islands.