RedSea weir cap (AI Prime HD)

Updated weir cap for RedSea tanks with a weir width of ~270mm (most tanks).

I made this to remove the stock weir cover so I could fit the aluminium mounting arm for the AI Prime 16HD, it may be suitable for the Hydra, I'm not sure. 

Be sure to print in PETG and allow sufficient time for the model to cool thoroughly before removing off the print bed (can see warping of my weir cover in pic from being impatient).