Bought an H2D two months ago and now there's H4D chatter already

I picked up my H2D just a month after you did, and honestly, I felt that same sense of relief when the dual nozzle functionality started showing up. I was struggling with the overhang settings on my big resin vat covers before I switched, and the H2D really made those complex bridge sections possable. I managed to finish a custom desk organizer for my workshop last week, and the quality of the infill was much better than my old setup.

I read a few things about the H4D speculation, and while the potential speed increase is cool, I think the practical benefits of having four independent heads are prolly overblown for the average home shop. Unless you are running a massive commercial volume of small parts, the extra footprint and complexity might not pay off in actual print time savings for me. I mostly just enjoy the consistent bed level and the reduced risk of clogs compared to my previous machine. I'm already planning out a shelf for my tools and a small calibration rig, so I'm going to stick with the H2D for the next year or two. It’s just nice knowing the hardware is reliable without having to worry about chasing bleeding specs from a hypothetical four head system. Just a quiet, steady print workflow is exactly what I need right now.

I’ve been running my H2D primarily for large functional parts for my garage, mostly using PETG because I needed something durable. While the dual nozzle functionality is definately a huge plus when tackling complex geometry, my biggest surprise has been the filament consumption rates. A simple 50cm cantilevered shelf that I figured would take maybe a couple of kilos ended up using closer to 4.5 kilograms, depending on how aggressively I set the infill percentage.

It makes me look at the H4D concept from a slightly diferent angle. If it truly has four heads operating simultaneously, the real variable that might limit total output isn't the printing speed of the plastic flow itself, but rather the throughput of the material handling system. I noticed that even with the faster print speeds, there are still bottlenecks related to how quickly the feeder can advance the spool and how the waste material is managed at the end of a long 24-hour print cycle.

I'm intersted in the projected size, though. If they manage to extend the print area significantly, even if a single print takes a long time, the sheer volume of parts that could be produced at once would change the calculation entirely. That would be the real advantage for someone like me trying to manufacture custom jigs for a workshop.

Honestly the four head thing only makes sense if you're doing production work. I run a small sign shop on the side and my H2D pays for itself doing batch jobs, but even for me the bottleneck is rarely nozzle count, it's cooling and bed space. I did time a batch of 24 bracket parts last month and mirror mode already cut the run nearly in half. Anything past two heads and you're mostly paying for firmware headaches and purge waste. I'd rather see them ship a bigger build volume before another extruder.

The offset head speculation is what I keep coming back to, because if the extra nozzles are staggered along the gantry rather than clustered, you could theoretically assign each one a band of the bed and really shave time on flat, repetitive parts. My worry is the purging tower getting worse instead of better, since every additional head means more material swaps to wipe out between tool changes. I'd want to see real multi material benchmarks before believing any of the speed claims, because four nozzles dragging around on one gantry also means more mass moving at speed, and that ussually costs you acceleration before it gains you anything.