Ok, so I'm building a Van De Graaff generator from parts i've been collecting for some time now. I have 2 hemispherical bowls that were supposed to line up perfectly to make the ball at the top. shipping has warped them just the slightest bit. I'm wondering if this will produce coronal leakage if i just connect them how they are with aluminium tape. That's the other thing, these bowls have no brim to reduce leakage, so would you recomend that I connect them with aluminum tape or something different.