Eye piece for 130p heritage

Hello again r/telescopes

 

I'm really enjoying the heritage you all recommended so far. Clouds have been limiting me a bit, but I finally managed to catch a view of Jupiter last night.

On the 25mm eyepiece I could tell it was not a star, but it was still a very small white dot. At 10mm the dot was still small, still very bright, but moving my head slightly I could tell the surface texture was not even, but no cloud bands. I could see 3 or the 4 large moons nearby, maybe the 4th one was behind or very close to Jupiter

Anyway. I've ordered a plossl 6.5mm eyepiece hoping to get slightly more detail, I wasn't confident enough to go for the 4mm. I understand the 130p is a relatively small scope with short focal length, I was wondering how far can I stretch the magnification? I tried a x3 cheap barlow but it was completely impossible to focus, couldn't screw the whole assembly in far enough but got pretty close.

If the 6.5mm works out I might invest a bit more money in a decent eyepiece. What would you guys recommend? I suspect I cannot push the magnification much beyond 100x that the 6.5 should provide. Jupiter was very bright at x65, suggesting I can go a good bit further before it is too dim or fuzzy?

Thanks, you guys are awesome