bathmate before hanging to help with sealing

I'm having some issues with losing a seal on my vachanger3 after about 25 minutes. I beleive this happens because I lose girth when I reach my flaccid stretched length and air gets in between the sealing cone and my shaft. I also would go into the bell with a slight chubby to help with sealing. But would lose it once fully stretched.

I tried using the compression sealing sleave with a shoelace and didn't lose suction, but the cone did start to slide a little bit over my glans.

Do you think using the bathmate for 5 minutes before going into the hanger would help maintain a good seal? Is that safe? Or should I buy a medium sealing cone and bell?

You can use the pump with good results for what you're trying to achieve. Just use a low pressure setting and be sure not to overpump.