I’m looking to upgrade some of my tools. I’m currently using a Delta scroll saw but it’s not very accurate. Short of buying a a Hegner what recommendations would you all have for an upgrade to my Delta for wooden ship modeling?
I'm not sure what you mean by "accurate". Accuracy with a scroll saw is determined by the skill of the operator, not the machine.
That said, there are certainly plenty of junk scroll saws available, and I think many people who eschew the use of scroll saws have only been exposed to the bad ones. Stay away from any that use a spring to return the blade. You need a "C" arm or parallel arm. Also look for one with easy access to the blade clamps. Oh yeah, NEVER buy a scroll saw that uses blades with pins in the ends. Pure junk.
Sure, you could spend thousands for a Hegner or similarly elite scroll saw, But there are some available for much less that work quite well. I purchased a DeWalt DW788 20" saw over 25 years ago and it is still going strong and they are still available. I think it was a package deal with the stand and work light, both of which I recommend. I would probably stay away from the cheaper 18" DeWalt saw available at some home centers. The DW788 is the one you want. It has a beefy cast iron table, variable speed and the thing runs so smoothly and with so little vibration that I can balance a nickel on its edge on the saw's table while it's running at full speed and the nickel just sits there. At the time I bought it, I also purchased an aftermarket add-on called an Easy-Lift. I can't find them, or any of their competitors, for sale anymore, but there are plenty of YouTube videos about how to make one yourself. This is an absolute MUST for this saw. The one downside of the saw is that when changing blades, the upper arm will drop down from gravity. The add-on lift arm keeps the arm elevated via a spring to keep it out of the way while threading a new blade through a hole in your workpiece (for inside fretwork).
I own two band saws and a scroll saw - and they each have their place. True, a bandsaw (with a small enough blade) can do many of the same things that a scroll saw can do, except for inside cuts. I can also change the blade in my scroll saw in less than 30 seconds as opposed to 5-10 minutes for my band saw.
Finally, learn how to use the tool and how to select blades. There are LOTS of how-to videos online for scroll sawing. The biggest problem that people have is that they buy a package of cheap blades, start to make a cut and then wonder why their work bounces up and down or why the blade ALWAYS wanders off to one side (perhaps this is the "accuracy" issue). Standard blades (even those from reputable companies like Olson) are stamped out. This inherently makes one side of the blade sharper than the other. The blade will naturally tend to drift toward the sharper side. Once you understand this, you will automatically compensate for it, but it takes practice. This drifting tendency is true for ALL scroll saws, regardless of the price. Of course, you could buy precision ground blades for 3-4 times the price, but you will typically go through blades fast enough, that it's much more cost effective to learn how to cut with the standard blades.
Do some research and watch some videos on beginning scroll sawing. I don't know what model Delta you have, but it could be that it is just fine and all you need is some understanding and practice.