AMS Glass Separation Riser w Front Rim

Remix of SpectreGadget's brilliant AMS riser. This adds a rim / lip to the front edge to fully capture the glass top and prevent it from sliding forward without lifting it up. I found that sometimes the glass would sometimes move forward during long prints, possibly due to the combination of the printing shaking about and/ or it not being perfectly level. I also added an additional 0.05mm clearance and shortened each dovetail for a bit easier assembly, but may add a touch more as I still needed a clamp to press things together.

• Adds a rim / lip to the front edge to fully capture the glass top
• Added an additional 0.05mm clearance and shortened each dovetail for a bit easier assembly