MDSlicer request

- (void) doIt
{
	[self.sliceApplyButton setEnabled:NO];
	
	int offset = self.firstStepSlider.intValue - 1;
	int length = self.lengthSlider.intValue;
	int skip = self.skipSlider.intValue;
	int sampleLength = self.sampleLengthSlider.intValue;
	float reverseAmt = self.reverseRandAmountSlider.intValue / 1000.0;
	float shuffleAmt = self.shuffleRandAmountSlider.intValue / 1000.0;
	MDSamplerSlicerDirection direction =
	self.directionControl.selectedSegment == 0 ? MDSamplerSlicerDirectionForward : MDSamplerSlicerDirectionBackward;
	BOOL generateLocks = self.genLocksToggle.state;
	
	[[MDMIDI sysex] request:MDSysexTransactionContextStatus
				  arguments:@{MDSysexTransactionArgumentKeyStatusID: @(0x22)}
				   priority:MDSysexTransactionQueuePriorityLow
			   onCompletion:^(MDSysexTransaction *t) {
				   
				   NSNumber *num = t.returnedObject;
				   int currentTrack = num.intValue;
				   
				   [[MDMIDI sysex] request:MDSysexTransactionContextCurrentPattern
								 arguments:nil
								  priority:MDSysexTransactionQueuePriorityLow
							  onCompletion:^(MDSysexTransaction *t) {
								  
								  MDPattern *pattern = t.returnedObject;
								  self.slicer.pattern = pattern;
								  self.slicer.trackIdx = currentTrack;
								  
								  self.slicer.offset = offset;
								  self.slicer.length = length;
								  self.slicer.stepInterval = skip;
								  self.slicer.sampleLength = sampleLength;
								  
								  self.slicer.sliceReverse = reverseAmt;
								  self.slicer.randomPlacement = shuffleAmt;
								  
								  self.slicer.direction = direction;
								  self.slicer.generateLocks = generateLocks;
								  
								  [self.slicer slice];
								  
								  [[[MDMIDI sharedInstance] machinedrumMidiDestination]
								   sendSysexData:pattern.sysexData];
								  
								  [self.sliceApplyButton setEnabled:self.connectionOkay];
								  
							  } onError:^(MDSysexTransaction *t) {
								  
								  NSLog(@"error, lol");
								  [self.sliceApplyButton setEnabled:self.connectionOkay];
								  
							  }];
				   
				   
			   } onError:^(MDSysexTransaction *t) {
				   
				   NSLog(@"oh crap.");
				   [self.sliceApplyButton setEnabled:self.connectionOkay];
				   
			   }];
}

many thanks for this