I'll be a little short on time as my flight out of SP is at 2PM, but I could stop by for a while earlier in the morning.
I'm a tradesman specializing in residential remodel/restoration and started out as a tile setter when I changed careers 12 years ago. One key point in a skilled trade such as this is mathematics. The Pythagoreum Theorem is used to verify that a line is straight. I do tile lay out mathematically to help determine the best setting pattern. Mixing dry/wet compounds is ratios. Your'e lucky to be on the metric system. Working with fractions is a pain, as in 5/8 - 7/16 = ? (answer is 3/16).
Let me know if you have an interest. I'll be leaving for SP on the 14th and be at Banana Beach.