New Plasma build in OZ

To go another direction on what I want included

Bed to be flat, no obstruction to loading on 3 sides
Easy to align sheets

Gutter beween the bed and cutting area to prevent water spillage.(I cant count how many times Ive also overfilled the water)

Rails inder the bed to keep them protected and as dust free as possible

Curved slats to help with light sheets and minimise wear on straight cuts

Filtration on the water, used a pool filter and glass beads to do this before, going the same again.

Remote lubrication system. Looking at 3 Automatic Lubrication Pumps, one for each axis.

Ability to add a scribe, probally wont add it initally though. Just going to be ready but both scribe and torch have to operate over the full cutting area.
Wider table to allow for 1800mm wide sheets. Also planning for a camera

Ability to move the table (using the fork or the tractor). This is for ocasional cleanup under the table and or access to other maintence work in the shop. IE sooner or latter the LED high bays will need to be accessed above the table. These are 6m up, so it would ne nice to be able to move the table for the sissor lift to get in.

Grantry as light as possible
Working though this in solidworks now. Testing various designs with varying alloy RHS beams. Mainly looking at the stiffness and fatigue and weight to start with.

Thats the major things

Prices in from industrial dynamics

4000mm rails $492.10 each
Carrages $58.10 each
Seal/Scraper kit $28.07 each
Shipping to Sunshine coast $170

Prics ex gst

Did you check the prices for supported round rails ?
They are much easier to work with and will tolerate fine plasma dust, HGR/HGH foes not, even a single spec getting inside them will lock them solid.
Happened once to a client while cleaning he pushed on the wipers.

Thats probably a fair price. I was quoted USD $45 a metre for genuine Hiwin HGR25 ex China. 4.0 m lengths would have to come by sea as they are too long for air freight. Thats not difficult through my freight forwarder but there is a MOQ of 10 lengths. At a guess there would be about AUD $150-$180 per length shipping so you'd need to add a fair bit more to the order to get the shipping down...

I can get SBR20 with 2 long carrages for $490 each

Not much difference there, here they are about 40% cheaper than HGR.