Mature Metal discussion

Hello all! I apologize for the flood of fitting questions I keep asking (and I suspect there are more to come), but can someone be both high and tight while also having a loose scrotum? Obviously, not simultaneously. My condition shifts depending on the weather, whether I’m working out, or if I’m just chilling. So here’s the thing: when my sac is hanging loosely, I can manage with a smaller base ring. But as soon as I put one on, I almost INSTANTLY shift from loose to high and tight. I’m planning to buy a double base ring. If that’s what I get, should it be round rather than oval? Or does the shape really not matter? The round ring gives me some discomfort at the bottom of my scrotum (the perineum area?). Aside from that spot though, both rings work well. Thanks for reading through this; I want to ensure I find the best possible fit. Comfort is key, but I definitely want to be locked in TIGHT!!!!:-)