thank lal, I saved both PDFs in my ALPS folder.
Also thanks Chloe for the ALPS data sheet.
According to the data sheet, travel is stated as 3.5mm for both SKCM and SKCL. life; 2 x 10,000,000 times. same as specs listed in APLS catalog '94 edition. ( Sorry but I don't have an active working scanner. I can't convert the catalog to PDF format. )