Top down fabrication can be likened to sculpting from a block of stone. A piece of the base material is gradually eroded until the desired shape is achieved. That is, you start at the top of the blank ...

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TOPPING SR2 Acrylic Rack SR2 is a rack suitable for larger models, suitable for D90 series, A90 series, Pre90, EXT90, U90, LA90, DM7, DX7 Pro, DX7 Pro+, DX5, D30 Pro, A30 Pro, MX5, and subsequent conferences. Launched E70, L70SR2.