no the papertrick is that you put a little piece of paper behind your acekard and then insert it into your ds. it makes a tighter fit, and therefore better contact.
if it doesn't lag anymore, you're problem is solved, that's what te paper was fore. The ds contacts will be fine, you need to do something very wrong if you want to wreck those.
For me if you want to emulate the DS the best option is on Android, use DraStic and a controller that holds your phone... it's clunky but it works insanely well. The next best option in my opinion is using a New 3DS XL, not really emulation but hacked it works really well.
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