I actually was a little apprehensive at first pinning my quads. Once I weighed out my results, how good I feel, how good I look. I definately have enough motivation to pin the quads. For me now I love pinning my quads. I can almost agree it is easier than pinning my glute. The only difference for me is that I can't push as much oil in to my quad as in my glute.
I don't want to say, man up. But weigh out the benefits and think about it...the only reason you are probably timid about pinning your quads is that you are inexperienced at pinning your quads and the unknown is really what you are afraid of. Watch a couple good videos on pinning your quads and you should be good. Hell, may be after a little practice you might be sitting where I am now, reflecting back on when you were afraid of pinning your quads.
G'luck my friend