Diatom sampler - prototype 1

One of my colleagues is studying diatoms in lakes in Antarctica. However, normally sampling diatoms involves getting wet, which is not terribly fun in Antarctic conditions. To get around this, we developed this sampler, allowing users to scrub and siphon diatoms from almost 1m below the surface, without coming in contact with the water.

In terms of hardware, it's quite cheap to make, requiring a handful of m3x20mm bolts, and 2 m5 x 75mm bolts. Stainless steel hardware is recommended. The poles are extruded aluminium poles of 16 and 25mm external diameter and 1m in length. It uses standard 50ml syringes with a centred nozzle.

This is just the first prototype, and there is a big list of improvements to be incorporated into future versions. In particular:
• Overall size to be decreased - to make it easy to transport. Currently the outer diameter is ~125mm, which makes it difficult to make a protective tube for transport. Ideally I'd like to get the diameter down to ~90mm, so it ca