I managed this sooner than I expected. I was down at Wave Leisure, Lewes for my early morning swim I swim ten lngths at a time (250m) made up of two 100 m i.e. 8 lengths of FC or BR then 50 m or two lengths as kick and then rest then repeat either on front crawl or breaststroke. In my simple way This lets me keep on top of how many lengths I have done. As i tite easily I use the kicker float as a pull-bouy and so do some of the FC as arms only.
E only set back? I cannot aford £4.10 a swim and buying in advance gains 1 swim for every 10. The alternative is a direct ebit that lets me come and go as I please.