Which ring on the spool would be considered the max capacity for the advertised capacity? Is it where the gold meets the black on the spool or higher with Berkley Pro-Spec? Trying to decide how to rig my Fathom 40NLD2 and thinking about Tunanorth's comment in another thread about mono taking a 2:1 capacity for top shot compared with braid. I'm kind of leaning towards going the hollow core route with a 500yd spool, but not completely against the 80lb ProSpec solid braid approach. Even more so if I decide to simply buy a 130lb flouro wind on leader with a loop to loop in the absolute rare situation I'm targeting the bluefin in to 150-170lbs with a flatfall (maybe 1-2x per year if that on a 1.5 day trip as a just in case scenario). I think I'll get more use out of the hollow core with wind on leaders, but do not have any first hand experience. Unfortunately this game plan all starts with a few assumptions as to what I already own and how often I would even use the outfit. The primary use for this will be a 50/60 outfit with a just in case scenario using 80lb - 130lb wind on flouro simply for abrasion resistance. Locally I don't have access to ProSpec and would need to order online, pickup in SD or go with what I have access to locally in bulk (J-Briad/MacCuato). Not really a PowerPro fan and 65lb 8 strand J-Briad is the same diameter as 80lb ProSpec. Example: Form the Berkley website it looks like ProSpec solid brad 80lb 0.016in | 0.40mm and the advertised Fathom 40NLD2 capacity is below: Braid Capacity yd/lb 785/50 665/65 565/80 Mono Capacity yd/lb 410/30 315/40 235/50 I typically don't fill my reels beyond where the black meets the gold so I think it would be helpful to know where the demarcation is for 565 yds when using 80lb ProSpec as advertised. If I go hollow core JB Hollow Core & Diamond 80lb is 0.457mm, 16 strand Toro Tamer is 0.45mm, etc so they're all about the same size as ProSpec hollow core. Trying to avoid a $100 mistake going the wrong route with the braid decision day 1. Any advice for those who have been down this route would be greatly appreciated. And yes I realize it's bringing a knife to a gun fight but just don't have the budget this year for a VISX just yet. Just would like to have options for the rare situation of going 80lb -130lb wind on/flouro topshot if needed. Thanks.