Hi guys, looking at potentially getting a Pelikan 400 sometime soon, but, of course, there are so many differnet ones that have been made. Friction fit script, screw in unit script, logo, logo in 400N, logo in 400NN, logo in 400NN M&K... which ones usually will have the most flexibility (or easiest flex)? I won't be using this for calligraphy or anything, but I do like to put some flair on my signatures and writing every so often and I'd love to have some breathing room for how far I can push it. Thanks! (Also, is there anything else I should know before buying one? This kind of purchase always makes me nervous!)