We have never done any pressure canning but plan to do some this year to save the garden harvest. I found my mother-in-laws pressure canner stored away in our garage. It is a Mirro-Matic and I am guessing it is about 10 quarts. I will obviously have to make actual measurements to be sure. I recall that my mother's pressure canner had a little weight that sat on top to regulate the pressure inside. The weight is missing on this unit. My questions:

1. Are the weights sold in various sizes to develop a particular pressure?

2. Are they a standard size or are all wights particular to brands?

3. Any other advice I should know before I start caning beans, fruits and all the good stuff from the garden?