i have concerns as there is no way to accurately hit the aluminum support dead on. If i do manage to do so, the drill bit is actually going to cut the aluminum support in half, not drill a hole. This can cause some issues with binding or trying to spread the stock. Think if trying to use a 3/8 or 10mm drill bit to drill into the end of 1/4" thick flat bar. its not going to to go well at all. Its not at all that i feel i would lose rigidity as im adding a steel rod that is stiffer than the aluminum itself.
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