That morse chart is a brilliant idea!
I learnt morse and did my morse test for my Amateur Radio licence. I also used it to a reasonable speed for quite a number of years because I couldn't afford expensive modulated (SSB) equipment.
Although I can still copy morse at speed, I find it a bit strange hearing the morse idents at such slow speed - I have to think about it. I think it's becasue one gets used to the sound of the whole letter at a particular speed, rather than thinking about the dots and the dashes.
[offtopic]Morse unfortunately is dying out from all types of radio telecommunication these days, which is a great shame. As a means of communication with the most basic of kit (costing less than two packets of cigarettes) over thousands of miles it cannot be beaten.[/offtopic]
There are plenty of morse tutors that can be freely downloaded (shareware/freeware), and it's a good effective way to learn.