Compaq Computer Corp, which on the strength of those storming third quarter figures (CI No 799) will be a billion dollar company this calendar year, has brought forward the second stage of its Scottish manufacturing plant at Erskine to try to cope with its huge international growth; the doubling of the first phase, currently nearing completion, will be finished by the end of next year, 12-months ahead of schedule; it will have 350 staff; at present demand levels, Compaq says it will not clear the backlog for Deskpro 286 and 386 by year-end.