Its all slurred, i tongue the 2nd semi in bar 5 (g) and the c on the semi after the 3rd beat gives it a bit of drive. do the same when it repeats up a tone. The cadenza.....cant tell you how to personalise it cos that defeats the object. I check the style of the music that has just gone and what comes after and try and join the styles with the cadenza. This one is follows a quick bit so I whip up to the top D, maybe an fp then cresc into the descending bit with a little break before the top B and keep going another octave down in triplets to a pedal G and stick a chord on it. Cheese the next bit up cos the audience love a jig from a soloist, also I pull back for the silly leaps (B,G,top G,bottom G, top G i think) and put a quick gliss through the last two octaves. Getting slower for the next bit then into the chromatic. Start slow, accel and go from bottom g to g above the top line with the chromatic then a slow gliss to a super G to finish. Try it and you will know what bits you like and which you could change slightly. Just play what you feel like playing, then its your solo and not someone elses. Hope that helps a bit. Dave Thornton is on here somewhere so I am more than a little concerned about revealing my theory on this cadenze, I am sure he could give a completely different view which would wipe the floor with mine. Good Luck.