I'm working on an open source filter design where the PCB can be reused for many future designs. It is based around a Sallen-key filter since a few changes to the capacitors and resistors can change it from a low-pass to a band-pass or a high-pass. When looking at layout, I've realized it would be very beneficial to make the capacitor and resistor pads fit both larger (like tantalum caps) to smaller 0402 packages.
Is there anything I should be careful of while designing this 'universal pad'? Is it possible someone has built something like this already?