I posted in Spanish section but I wanted to do it in here in English section too. Since Im playing here in Ultima server Im seeing many wrong tekked weapons in the trade forum, so here some info.
Any weapon that has percents can have their percents increased by +10%. If the tekker doesnt increase the percents by 10% then keep trying. This is crucial with hit % weapons.
To tekk correctly: (We will use an example (A cross scar with 0/15/20/5) untekked.) Untekked is the phrase used for a weapon still in the unknown state.
By showing it to the tekker, these initial %'s may change. They can go up (as far as 10% higher), which would result in a 0/25/30/15 Cross Scar, and they can also go down by upto 10% (0/5/10/-5).
If a weapon has 0/0/0/0 untekked, it is likely that this will not change after the tekking.
Please, learn to tekk properly- it's lowering your item's potential value by a large amount.
Hopefully that helps some people out...