Have a Sternkreuz press i use for most glasses. Love it. I bought a second one on tradera some month ago for spares. Also have an other which looks like a Robur but not 100% sure it's a Robur. Was thinking i could make an adapter so i could use some other dies as the Robur ones cost a lot of money. Maybe i can part with that as i have to many presses anyway.
My experience with the handheld cheap Chinese glass presses on eBay is truly poor, and I've come to learn that I'm not alone. Yesterday I was struggling with it for over 30 minutes to fit an armoured glass in a Vostok Amphibian before giving up. At that point, while still holding it in my hand looking at it with disdain, I thought: "What a piece of utter rubbish!".
Anyway, what I'd really want would be a Robus press, but gosh, that would be over £500 with the die set (tax included, excluding shipping)! So, I found this tool "Professional spindle press for housings and glasses with twenty-four inserts" on eBay for £72. It sure sounds promising, but it would be great with a review, or if none can be had your opinion.
Sharpening is a science and an industry. Trivia facts follow
An important figure in drill sharpening is Joseph Mazoff, a self-taught American. His article is still current on the matter and the basis for most sharpeners, I have attached it here.
A 1st brand drill bit sharpener can cost €600 https://www.wabeco-remscheid.de/catalog/product/view/id/6710/s/spiralbohrer-schleifmaschine/category/487/
It's Chinese copy, one half of that https://www.aliexpress.com/item/Drill-Bit-Electric-Big-Grinder-MR-13A-CNC-drilling-cutter-grinding-machines-with-ER11-collects/32867482062.html
If you have something that cuts there is a professional way to sharpen it. Blunt axe? No problem https://www.sharpening.org.uk/product/tormek-sva-170-axe-grinding-jig/
I'm currently disputing an Amazon seller that sent a cheap knife sharpener instead of a 75mm grinding wheel