I am a first time kel-tec owner. Just got my new Gen 2 sub 2000. While I do like the gun a lot, I found the sights are way too low for me, and am unable to obtain a proper sight picture, even when I force my cheek down real hard on the bolt tube. This takes the enjoyment out of shooting the gun. Do you have a similar experience? If so, is there a after market replacement that is taller?