kh laser problems reading trans dipstick

[reddevil6]

Hey guys trying to check trans fluid on my kh laser 1.6l carby 3 speed auto. When cold oil shows up to full line. Take for quick 5 min drive, then put through all gears an back to park. I check then wipe clean bout 3 times over oil looks like just above low line but when i look closely it does go up to full line just very thin looking in between low and full. Which reading would be correct? Also is it hard to fit a trans filter kit?