Thanks for the information. What about cars? How can I register it from the passenger class to the commercial class?
Cars can be registered in the commercial class, if all seats are removed behind the driver and replaced with a permanent box or permanent rack to carry cargo.
Is there anywhere else I can obtain a weight slip for my truck?
Yes. Aside from vehicle and metal scrapyards, you can also receive a weight slip from some auto parts stores and mechanic shops, especially if they specialize in modifications.