However, one serious drawback exists in the method. The main drawback of this type of aircraft was its lack of speed. One drawback of parallel portfolios is the amount of duplicate work. ITO has the drawback of being expensive. One drawback of oxen was the difficulty of shoeing. A major drawback of QD is their relatively high toxicity. Unfortunately the 175 cc family had a considerable drawback. The main drawback to Mongol horses was their lack of speed. A drawback to the Ramsbottom type was its complexity. He has said the only real drawback to being small was the associated health problems. The drawback of this approach is its limited acceleration. The main drawback with this type of mold is the cost. Their lower fidelity was not considered a serious drawback. The primary drawback to masonry siding is the initial cost. Wildcards are flexible, but there is a drawback.