Timing residuals (observed minus predicted times of arrival vs time) for PSR J1022+1001, monthly observed for the LEAP project (Bassa et al. 2016) from March 2014 to January 2016. The black points refer to the SRT and the blue ones to WSRT. We note that the WSRT used 10 dishes in March and April 2014 (for an equivalent size of 75-m), nine from May to August 2014 and eight from September 2014 to January 2015. The number of WSRT dishes available for LEAP observations decreased to seven and then to five (66 to 56-m equivalent size) from February to June 2015, when the last LEAP point at WSRT was taken (Janssen priv. comm.).