Drag interval

dragStart: function (args) {
   args.interval = 30;
},timeScale: {
   enable: true,
   interval: 30,
   slotCount: 2
}

this combination works ok, but if I set args.interval = 5; Only on margin times event drag is ok (eg. 09:00, 09:30) but on 9:10, 9:20 is not ok - wrong time is selected.

I want to achieve that I can have events that will have duration minimum 5 minutes - with timescale interval 15min ( config above ). Is this possible?

9:00 - 9:05 -- Appointment1

9:05 - 9:15 -- Appointment2

with config above event  is created with good time, but representation is not ok, it has a height of event interval block - 15min in this case. 

Edit: I know for option in timescale: 60 - 6, but for me is important that 1h interval is not higher than 200px.

Edit2: Also, is it possible to have drag only on end of event?

Tnx!

eventRendered: function (args) {
   if(_scheduler.currentView != 'Month') {
      // calendarStep is 30 or 60, timscaleSlot valua is set to 2
      let _cellDuration = calendarSettings.calendarStep / 2;
      if (args.data.Duration < _cellDuration) {
         args.element.style.height = args.data.Duration * 50 / _cellDuration +'px';
      }
   }
}

.e-schedule .e-event-resize.e-top-handler {
   display: none!important;
}

.e-schedule .e-event-resize.e-bottom-handler {
   height: 5px!important;
}

dragStart: function (args) {
   args.interval = 5;
   args.cancel = args.data.NoShow;
},