Maryland is going back to basics — an ink pen and paper ballot — for this month’s presidential primary. Like every new voting system, this one has some quirks that likely will become more apparent when the November general election brings more than 2 million Maryland voters to the polls. The system requires most voters to mark their ballots by filling in ovals, similar to those on standardized tests, with pens provided by election judges. Voters feed their marked ballots into scanning machines that tabulate the results. The new system largely replaces touch-screen terminals, which eliminated the “hanging chads” and other difficulties in discerning voter intent on paper punch-card ballots highlighted by the 2000 presidential election. Maryland implemented electronic voting in 2002 but glitches and security concerns prompted the General Assembly to vote in 2007 for a return to paper balloting.