Interesting - can you supply a breakdown of that 8Kg, and does it include the rucksak (it should - it goes on your back!)?
As I buy gear, I weigh it and enter it into a computer database. When I plan a trip I type out a list and process it with a perl script to extract the weights of the items and total it. I include pretty much everything I carry.
This summer I'll probably be carrying nearer 20Kg, but that will include a DSLR camera and lenses.
Jim
Sounds a lot like hard work to me - a simple jet database with a configurable check based query would return an answer without all that tedious scripting - hell a "sumif" in a spreadheet with a check column would be more efficient.Add a couple of additional additional logic steps (parameterised selections from categories such as "select one sleeping bag") and these could easily be semi automated based on secondary parameters (season, terrain etc.)
Perl scripts?

Red