If you have a 3D printer then Thingiverse and Tinkercad have lots of MFT dog fittings files. Although not as robust as say Axminster many are a step up in useful design.You cannot compare that Erbuar to the Bosch, they are in completely different classes and upto a point you will only get what you pay for. The Bosch tracks get good reviews on track alignment when joining but are a different profile to Makita / Festool and the Bosch has many similarities to the Maefel except cost. Another good saw to consider is the Makiti SP6000 and is what I use and can be purchased for reasonable money.
https://its.co.uk/pd/makita-sp6000j...onnector-piece-2x-clamps-_maksp6000j1kit6.htm
Apart from the saw and tracks you can also get accessories to use the track on a worktop with 20mm holes from Benchdogs, just another option along with things like track squares and parallel guides.
https://benchdogs.co.uk/collections/hinge-system
https://benchdogs.co.uk/collections/rail-square
https://benchdogs.co.uk/products/33...em-festool-makita?_pos=1&_sid=e4aa78257&_ss=r
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