You will need to replace the lid on that kit to a temper glass lid which can be hard depending on where you live so maybe look for the kit that has the tempered glass lid. Usually the pressure gauge is mounted on the side of the stainless chamber.
Reason being is that the vapour from the cactus juice stabilizing resin destroys the acrylic lids they start getting what look like spider web fractures through them. Some people have had there's last a few months then need replacing. I had mine implode under full vacuum the second batch of wood I was stabilizing and it only had very minor spiders web form after the first cycle. When it imploded it literally sounded like a bomb had gone off the whole house shook covered the whole garage in red dyed cactus juice.
The pumps on those units work OK provided you drain the oil and replace it with new oil every 2-3 batches of wood you stabilize. It's a learning curve in the beginning but you will get the hang of it with some practice.
Another tip is don't try stabilize large blocks its easier if you pre cut your timber to the thickness of the handle slabs you get better results.